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Finding the Fourth Proportional to 716.78, 988.92 and 454.76

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Solution

The fourth proportional to 716.78, 988.92 and 454.76 is: 627.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.78 : 988.92 = 454.76 : x
  2. Step 2: Convert to fraction form
    716.78/988.92 = 454.76/x
  3. Step 3: Cross multiply
    716.78x = 988.92 × 454.76
  4. Step 4: Simplify right side
    716.78x = 449,721.26
  5. Step 5: Solve for x
    x = 449,721.26/716.78
  6. Step 6: Final answer
    x = 627.42

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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.