Home / 426,229.32-639,287.10-126,704.28

Finding the Fourth Proportional to 426,229.32, 639,287.10 and 126,704.28

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Solution

The fourth proportional to 426,229.32, 639,287.10 and 126,704.28 is: 190,039.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,229.32 : 639,287.10 = 126,704.28 : x
  2. Step 2: Convert to fraction form
    426,229.32/639,287.10 = 126,704.28/x
  3. Step 3: Cross multiply
    426,229.32x = 639,287.10 × 126,704.28
  4. Step 4: Simplify right side
    426,229.32x = 81,000,411,718.79
  5. Step 5: Solve for x
    x = 81,000,411,718.79/426,229.32
  6. Step 6: Final answer
    x = 190,039.51

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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.