Home / 688,839.40-1,031,415.90-438,164.20

Finding the Fourth Proportional to 688,839.40, 1,031,415.90 and 438,164.20

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Solution

The fourth proportional to 688,839.40, 1,031,415.90 and 438,164.20 is: 656,073.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,839.40 : 1,031,415.90 = 438,164.20 : x
  2. Step 2: Convert to fraction form
    688,839.40/1,031,415.90 = 438,164.20/x
  3. Step 3: Cross multiply
    688,839.40x = 1,031,415.90 × 438,164.20
  4. Step 4: Simplify right side
    688,839.40x = 451,929,522,690.78
  5. Step 5: Solve for x
    x = 451,929,522,690.78/688,839.40
  6. Step 6: Final answer
    x = 656,073.86

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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.