Home / 1,432.69-2,148.17-691.85

Finding the Fourth Proportional to 1,432.69, 2,148.17 and 691.85

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Solution

The fourth proportional to 1,432.69, 2,148.17 and 691.85 is: 1,037.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.69 : 2,148.17 = 691.85 : x
  2. Step 2: Convert to fraction form
    1,432.69/2,148.17 = 691.85/x
  3. Step 3: Cross multiply
    1,432.69x = 2,148.17 × 691.85
  4. Step 4: Simplify right side
    1,432.69x = 1,486,211.41
  5. Step 5: Solve for x
    x = 1,486,211.41/1,432.69
  6. Step 6: Final answer
    x = 1,037.36

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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.