Home / 989,917,423.20-1,484,876,134.80-445,721,839.20

Finding the Fourth Proportional to 989,917,423.20, 1,484,876,134.80 and 445,721,839.20

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Solution

The fourth proportional to 989,917,423.20, 1,484,876,134.80 and 445,721,839.20 is: 668,582,758.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,917,423.20 : 1,484,876,134.80 = 445,721,839.20 : x
  2. Step 2: Convert to fraction form
    989,917,423.20/1,484,876,134.80 = 445,721,839.20/x
  3. Step 3: Cross multiply
    989,917,423.20x = 1,484,876,134.80 × 445,721,839.20
  4. Step 4: Simplify right side
    989,917,423.20x = 661,841,721,787,243,136
  5. Step 5: Solve for x
    x = 661,841,721,787,243,136/989,917,423.20
  6. Step 6: Final answer
    x = 668,582,758.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.