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Finding the Fourth Proportional to 662.89, 989.49 and 614.70

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Solution

The fourth proportional to 662.89, 989.49 and 614.70 is: 917.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.89 : 989.49 = 614.70 : x
  2. Step 2: Convert to fraction form
    662.89/989.49 = 614.70/x
  3. Step 3: Cross multiply
    662.89x = 989.49 × 614.70
  4. Step 4: Simplify right side
    662.89x = 608,240.91
  5. Step 5: Solve for x
    x = 608,240.91/662.89
  6. Step 6: Final answer
    x = 917.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.