Home / 1,218,076,001.33-1,680,901,389.61-689,428,637.19

Finding the Fourth Proportional to 1,218,076,001.33, 1,680,901,389.61 and 689,428,637.19

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Solution

The fourth proportional to 1,218,076,001.33, 1,680,901,389.61 and 689,428,637.19 is: 951,386,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,076,001.33 : 1,680,901,389.61 = 689,428,637.19 : x
  2. Step 2: Convert to fraction form
    1,218,076,001.33/1,680,901,389.61 = 689,428,637.19/x
  3. Step 3: Cross multiply
    1,218,076,001.33x = 1,680,901,389.61 × 689,428,637.19
  4. Step 4: Simplify right side
    1,218,076,001.33x = 1,158,861,554,287,876,096
  5. Step 5: Solve for x
    x = 1,158,861,554,287,876,096/1,218,076,001.33
  6. Step 6: Final answer
    x = 951,386,902.81

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Double scale
Find fourth proportional to 1,218,076,002.33, 1,680,901,390.99 and 689,428,638.19
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.