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Finding the Fourth Proportional to 716.90, 989.26 and 454.82

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Solution

The fourth proportional to 716.90, 989.26 and 454.82 is: 627.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.90 : 989.26 = 454.82 : x
  2. Step 2: Convert to fraction form
    716.90/989.26 = 454.82/x
  3. Step 3: Cross multiply
    716.90x = 989.26 × 454.82
  4. Step 4: Simplify right side
    716.90x = 449,929.15
  5. Step 5: Solve for x
    x = 449,929.15/716.90
  6. Step 6: Final answer
    x = 627.61

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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.