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Finding the Fourth Proportional to 663,635.79, 915,818.31 and 361,829.79

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Solution

The fourth proportional to 663,635.79, 915,818.31 and 361,829.79 is: 499,325.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,635.79 : 915,818.31 = 361,829.79 : x
  2. Step 2: Convert to fraction form
    663,635.79/915,818.31 = 361,829.79/x
  3. Step 3: Cross multiply
    663,635.79x = 915,818.31 × 361,829.79
  4. Step 4: Simplify right side
    663,635.79x = 331,370,346,785.46
  5. Step 5: Solve for x
    x = 331,370,346,785.46/663,635.79
  6. Step 6: Final answer
    x = 499,325.61

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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.