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Finding the Fourth Proportional to 1,124.62, 1,687.24 and 355.12

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Solution

The fourth proportional to 1,124.62, 1,687.24 and 355.12 is: 532.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.62 : 1,687.24 = 355.12 : x
  2. Step 2: Convert to fraction form
    1,124.62/1,687.24 = 355.12/x
  3. Step 3: Cross multiply
    1,124.62x = 1,687.24 × 355.12
  4. Step 4: Simplify right side
    1,124.62x = 599,172.67
  5. Step 5: Solve for x
    x = 599,172.67/1,124.62
  6. Step 6: Final answer
    x = 532.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.