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Finding the Fourth Proportional to 625,455.92, 863,105.95 and 338,969.86

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Solution

The fourth proportional to 625,455.92, 863,105.95 and 338,969.86 is: 467,765.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,455.92 : 863,105.95 = 338,969.86 : x
  2. Step 2: Convert to fraction form
    625,455.92/863,105.95 = 338,969.86/x
  3. Step 3: Cross multiply
    625,455.92x = 863,105.95 × 338,969.86
  4. Step 4: Simplify right side
    625,455.92x = 292,566,903,036.67
  5. Step 5: Solve for x
    x = 292,566,903,036.67/625,455.92
  6. Step 6: Final answer
    x = 467,765.82

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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.