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Finding the Fourth Proportional to 1,132.52, 1,698.80 and 439.23

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Solution

The fourth proportional to 1,132.52, 1,698.80 and 439.23 is: 658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.52 : 1,698.80 = 439.23 : x
  2. Step 2: Convert to fraction form
    1,132.52/1,698.80 = 439.23/x
  3. Step 3: Cross multiply
    1,132.52x = 1,698.80 × 439.23
  4. Step 4: Simplify right side
    1,132.52x = 746,155.36
  5. Step 5: Solve for x
    x = 746,155.36/1,132.52
  6. Step 6: Final answer
    x = 658.85

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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.