Home / 680,001.28-1,019,068.80-430,236.16

Finding the Fourth Proportional to 680,001.28, 1,019,068.80 and 430,236.16

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Solution

The fourth proportional to 680,001.28, 1,019,068.80 and 430,236.16 is: 644,763.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,001.28 : 1,019,068.80 = 430,236.16 : x
  2. Step 2: Convert to fraction form
    680,001.28/1,019,068.80 = 430,236.16/x
  3. Step 3: Cross multiply
    680,001.28x = 1,019,068.80 × 430,236.16
  4. Step 4: Simplify right side
    680,001.28x = 438,440,247,287.81
  5. Step 5: Solve for x
    x = 438,440,247,287.81/680,001.28
  6. Step 6: Final answer
    x = 644,763.86

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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.