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Finding the Fourth Proportional to 999.70, 1,496.85 and 724.30

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Solution

The fourth proportional to 999.70, 1,496.85 and 724.30 is: 1,084.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.70 : 1,496.85 = 724.30 : x
  2. Step 2: Convert to fraction form
    999.70/1,496.85 = 724.30/x
  3. Step 3: Cross multiply
    999.70x = 1,496.85 × 724.30
  4. Step 4: Simplify right side
    999.70x = 1,084,168.46
  5. Step 5: Solve for x
    x = 1,084,168.46/999.70
  6. Step 6: Final answer
    x = 1,084.49

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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.