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Finding the Fourth Proportional to 1,124.12, 1,686.17 and 354.62

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Solution

The fourth proportional to 1,124.12, 1,686.17 and 354.62 is: 531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.12 : 1,686.17 = 354.62 : x
  2. Step 2: Convert to fraction form
    1,124.12/1,686.17 = 354.62/x
  3. Step 3: Cross multiply
    1,124.12x = 1,686.17 × 354.62
  4. Step 4: Simplify right side
    1,124.12x = 597,939.40
  5. Step 5: Solve for x
    x = 597,939.40/1,124.12
  6. Step 6: Final answer
    x = 531.92

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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.