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Finding the Fourth Proportional to 1,310.93, 1,966.54 and 531.20

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Solution

The fourth proportional to 1,310.93, 1,966.54 and 531.20 is: 796.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.93 : 1,966.54 = 531.20 : x
  2. Step 2: Convert to fraction form
    1,310.93/1,966.54 = 531.20/x
  3. Step 3: Cross multiply
    1,310.93x = 1,966.54 × 531.20
  4. Step 4: Simplify right side
    1,310.93x = 1,044,626.05
  5. Step 5: Solve for x
    x = 1,044,626.05/1,310.93
  6. Step 6: Final answer
    x = 796.86

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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.