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Finding the Fourth Proportional to 716.48, 988.89 and 454.44

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Solution

The fourth proportional to 716.48, 988.89 and 454.44 is: 627.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.48 : 988.89 = 454.44 : x
  2. Step 2: Convert to fraction form
    716.48/988.89 = 454.44/x
  3. Step 3: Cross multiply
    716.48x = 988.89 × 454.44
  4. Step 4: Simplify right side
    716.48x = 449,391.17
  5. Step 5: Solve for x
    x = 449,391.17/716.48
  6. Step 6: Final answer
    x = 627.23

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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.