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Finding the Fourth Proportional to 629,751.28, 869,023.98 and 357,781.43

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Solution

The fourth proportional to 629,751.28, 869,023.98 and 357,781.43 is: 493,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,751.28 : 869,023.98 = 357,781.43 : x
  2. Step 2: Convert to fraction form
    629,751.28/869,023.98 = 357,781.43/x
  3. Step 3: Cross multiply
    629,751.28x = 869,023.98 × 357,781.43
  4. Step 4: Simplify right side
    629,751.28x = 310,920,643,758.07
  5. Step 5: Solve for x
    x = 310,920,643,758.07/629,751.28
  6. Step 6: Final answer
    x = 493,719.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.