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Finding the Fourth Proportional to 716.97, 989.58 and 454.94

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Solution

The fourth proportional to 716.97, 989.58 and 454.94 is: 627.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.97 : 989.58 = 454.94 : x
  2. Step 2: Convert to fraction form
    716.97/989.58 = 454.94/x
  3. Step 3: Cross multiply
    716.97x = 989.58 × 454.94
  4. Step 4: Simplify right side
    716.97x = 450,199.53
  5. Step 5: Solve for x
    x = 450,199.53/716.97
  6. Step 6: Final answer
    x = 627.92

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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.