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Finding the Fourth Proportional to 716.21, 987.67 and 467.75

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Solution

The fourth proportional to 716.21, 987.67 and 467.75 is: 645.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.21 : 987.67 = 467.75 : x
  2. Step 2: Convert to fraction form
    716.21/987.67 = 467.75/x
  3. Step 3: Cross multiply
    716.21x = 987.67 × 467.75
  4. Step 4: Simplify right side
    716.21x = 461,982.64
  5. Step 5: Solve for x
    x = 461,982.64/716.21
  6. Step 6: Final answer
    x = 645.04

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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.