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Finding the Fourth Proportional to 1,003.70, 1,505.55 and 614.90

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Solution

The fourth proportional to 1,003.70, 1,505.55 and 614.90 is: 922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.70 : 1,505.55 = 614.90 : x
  2. Step 2: Convert to fraction form
    1,003.70/1,505.55 = 614.90/x
  3. Step 3: Cross multiply
    1,003.70x = 1,505.55 × 614.90
  4. Step 4: Simplify right side
    1,003.70x = 925,762.70
  5. Step 5: Solve for x
    x = 925,762.70/1,003.70
  6. Step 6: Final answer
    x = 922.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.