Home / 1,125.16-1,687.28-508.70

Finding the Fourth Proportional to 1,125.16, 1,687.28 and 508.70

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Solution

The fourth proportional to 1,125.16, 1,687.28 and 508.70 is: 762.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.16 : 1,687.28 = 508.70 : x
  2. Step 2: Convert to fraction form
    1,125.16/1,687.28 = 508.70/x
  3. Step 3: Cross multiply
    1,125.16x = 1,687.28 × 508.70
  4. Step 4: Simplify right side
    1,125.16x = 858,321.01
  5. Step 5: Solve for x
    x = 858,321.01/1,125.16
  6. Step 6: Final answer
    x = 762.85

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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.