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Finding the Fourth Proportional to 864.11, 1,191.85 and 532.42

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Solution

The fourth proportional to 864.11, 1,191.85 and 532.42 is: 734.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.11 : 1,191.85 = 532.42 : x
  2. Step 2: Convert to fraction form
    864.11/1,191.85 = 532.42/x
  3. Step 3: Cross multiply
    864.11x = 1,191.85 × 532.42
  4. Step 4: Simplify right side
    864.11x = 634,560.47
  5. Step 5: Solve for x
    x = 634,560.47/864.11
  6. Step 6: Final answer
    x = 734.35

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1.5x scale

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.