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Finding the Fourth Proportional to 862.93, 1,191.51 and 531.49

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Solution

The fourth proportional to 862.93, 1,191.51 and 531.49 is: 733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.93 : 1,191.51 = 531.49 : x
  2. Step 2: Convert to fraction form
    862.93/1,191.51 = 531.49/x
  3. Step 3: Cross multiply
    862.93x = 1,191.51 × 531.49
  4. Step 4: Simplify right side
    862.93x = 633,275.65
  5. Step 5: Solve for x
    x = 633,275.65/862.93
  6. Step 6: Final answer
    x = 733.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.