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Finding the Fourth Proportional to 641.39, 965.48 and 547.43

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Solution

The fourth proportional to 641.39, 965.48 and 547.43 is: 824.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.39 : 965.48 = 547.43 : x
  2. Step 2: Convert to fraction form
    641.39/965.48 = 547.43/x
  3. Step 3: Cross multiply
    641.39x = 965.48 × 547.43
  4. Step 4: Simplify right side
    641.39x = 528,536.50
  5. Step 5: Solve for x
    x = 528,536.50/641.39
  6. Step 6: Final answer
    x = 824.05

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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.