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Finding the Fourth Proportional to 1,147.76, 1,721.16 and 531.38

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Solution

The fourth proportional to 1,147.76, 1,721.16 and 531.38 is: 796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.76 : 1,721.16 = 531.38 : x
  2. Step 2: Convert to fraction form
    1,147.76/1,721.16 = 531.38/x
  3. Step 3: Cross multiply
    1,147.76x = 1,721.16 × 531.38
  4. Step 4: Simplify right side
    1,147.76x = 914,590.00
  5. Step 5: Solve for x
    x = 914,590.00/1,147.76
  6. Step 6: Final answer
    x = 796.85

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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.