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Finding the Fourth Proportional to 871.32, 1,307.19 and 506.43

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Solution

The fourth proportional to 871.32, 1,307.19 and 506.43 is: 759.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.32 : 1,307.19 = 506.43 : x
  2. Step 2: Convert to fraction form
    871.32/1,307.19 = 506.43/x
  3. Step 3: Cross multiply
    871.32x = 1,307.19 × 506.43
  4. Step 4: Simplify right side
    871.32x = 662,000.23
  5. Step 5: Solve for x
    x = 662,000.23/871.32
  6. Step 6: Final answer
    x = 759.77

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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.