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Finding the Fourth Proportional to 1,148.72, 1,721.73 and 531.11

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Solution

The fourth proportional to 1,148.72, 1,721.73 and 531.11 is: 796.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.72 : 1,721.73 = 531.11 : x
  2. Step 2: Convert to fraction form
    1,148.72/1,721.73 = 531.11/x
  3. Step 3: Cross multiply
    1,148.72x = 1,721.73 × 531.11
  4. Step 4: Simplify right side
    1,148.72x = 914,428.02
  5. Step 5: Solve for x
    x = 914,428.02/1,148.72
  6. Step 6: Final answer
    x = 796.04

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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.