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Finding the Fourth Proportional to 663,149.88, 915,147.18 and 361,343.88

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Solution

The fourth proportional to 663,149.88, 915,147.18 and 361,343.88 is: 498,654.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,149.88 : 915,147.18 = 361,343.88 : x
  2. Step 2: Convert to fraction form
    663,149.88/915,147.18 = 361,343.88/x
  3. Step 3: Cross multiply
    663,149.88x = 915,147.18 × 361,343.88
  4. Step 4: Simplify right side
    663,149.88x = 330,682,832,792.26
  5. Step 5: Solve for x
    x = 330,682,832,792.26/663,149.88
  6. Step 6: Final answer
    x = 498,654.74

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1.5x scale

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.