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Finding the Fourth Proportional to 629,139.39, 868,251.86 and 357,103.72

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Solution

The fourth proportional to 629,139.39, 868,251.86 and 357,103.72 is: 492,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,139.39 : 868,251.86 = 357,103.72 : x
  2. Step 2: Convert to fraction form
    629,139.39/868,251.86 = 357,103.72/x
  3. Step 3: Cross multiply
    629,139.39x = 868,251.86 × 357,103.72
  4. Step 4: Simplify right side
    629,139.39x = 310,055,969,102.92
  5. Step 5: Solve for x
    x = 310,055,969,102.92/629,139.39
  6. Step 6: Final answer
    x = 492,825.56

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1.5x scale

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.