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Finding the Fourth Proportional to 663,539.12, 915,679.32 and 361,735.28

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Solution

The fourth proportional to 663,539.12, 915,679.32 and 361,735.28 is: 499,192.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,539.12 : 915,679.32 = 361,735.28 : x
  2. Step 2: Convert to fraction form
    663,539.12/915,679.32 = 361,735.28/x
  3. Step 3: Cross multiply
    663,539.12x = 915,679.32 × 361,735.28
  4. Step 4: Simplify right side
    663,539.12x = 331,233,515,210.41
  5. Step 5: Solve for x
    x = 331,233,515,210.41/663,539.12
  6. Step 6: Final answer
    x = 499,192.14

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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.