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Finding the Fourth Proportional to 663,127.44, 915,115.87 and 361,321.44

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Solution

The fourth proportional to 663,127.44, 915,115.87 and 361,321.44 is: 498,623.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,127.44 : 915,115.87 = 361,321.44 : x
  2. Step 2: Convert to fraction form
    663,127.44/915,115.87 = 361,321.44/x
  3. Step 3: Cross multiply
    663,127.44x = 915,115.87 × 361,321.44
  4. Step 4: Simplify right side
    663,127.44x = 330,650,982,730.21
  5. Step 5: Solve for x
    x = 330,650,982,730.21/663,127.44
  6. Step 6: Final answer
    x = 498,623.59

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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.