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Finding the Fourth Proportional to 625,409.70, 863,066.13 and 338,929.79

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Solution

The fourth proportional to 625,409.70, 863,066.13 and 338,929.79 is: 467,723.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,409.70 : 863,066.13 = 338,929.79 : x
  2. Step 2: Convert to fraction form
    625,409.70/863,066.13 = 338,929.79/x
  3. Step 3: Cross multiply
    625,409.70x = 863,066.13 × 338,929.79
  4. Step 4: Simplify right side
    625,409.70x = 292,518,817,881.68
  5. Step 5: Solve for x
    x = 292,518,817,881.68/625,409.70
  6. Step 6: Final answer
    x = 467,723.51

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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.