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Finding the Fourth Proportional to 426,851.43, 640,269.84 and 127,332.87

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Solution

The fourth proportional to 426,851.43, 640,269.84 and 127,332.87 is: 190,997.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,851.43 : 640,269.84 = 127,332.87 : x
  2. Step 2: Convert to fraction form
    426,851.43/640,269.84 = 127,332.87/x
  3. Step 3: Cross multiply
    426,851.43x = 640,269.84 × 127,332.87
  4. Step 4: Simplify right side
    426,851.43x = 81,527,396,301.64
  5. Step 5: Solve for x
    x = 81,527,396,301.64/426,851.43
  6. Step 6: Final answer
    x = 190,997.13

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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.