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Finding the Fourth Proportional to 458,812.20, 688,218.30 and 429,287.70

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Solution

The fourth proportional to 458,812.20, 688,218.30 and 429,287.70 is: 643,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,812.20 : 688,218.30 = 429,287.70 : x
  2. Step 2: Convert to fraction form
    458,812.20/688,218.30 = 429,287.70/x
  3. Step 3: Cross multiply
    458,812.20x = 688,218.30 × 429,287.70
  4. Step 4: Simplify right side
    458,812.20x = 295,443,651,104.91
  5. Step 5: Solve for x
    x = 295,443,651,104.91/458,812.20
  6. Step 6: Final answer
    x = 643,931.55

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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.