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Finding the Fourth Proportional to 641.27, 965.29 and 547.31

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Solution

The fourth proportional to 641.27, 965.29 and 547.31 is: 823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.27 : 965.29 = 547.31 : x
  2. Step 2: Convert to fraction form
    641.27/965.29 = 547.31/x
  3. Step 3: Cross multiply
    641.27x = 965.29 × 547.31
  4. Step 4: Simplify right side
    641.27x = 528,312.87
  5. Step 5: Solve for x
    x = 528,312.87/641.27
  6. Step 6: Final answer
    x = 823.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.