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Finding the Fourth Proportional to 871.65, 1,306.67 and 506.34

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Solution

The fourth proportional to 871.65, 1,306.67 and 506.34 is: 759.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.65 : 1,306.67 = 506.34 : x
  2. Step 2: Convert to fraction form
    871.65/1,306.67 = 506.34/x
  3. Step 3: Cross multiply
    871.65x = 1,306.67 × 506.34
  4. Step 4: Simplify right side
    871.65x = 661,616.76
  5. Step 5: Solve for x
    x = 661,616.76/871.65
  6. Step 6: Final answer
    x = 759.04

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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.