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Finding the Fourth Proportional to 1,144.92, 1,579.46 and 725.16

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Solution

The fourth proportional to 1,144.92, 1,579.46 and 725.16 is: 1,000.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.92 : 1,579.46 = 725.16 : x
  2. Step 2: Convert to fraction form
    1,144.92/1,579.46 = 725.16/x
  3. Step 3: Cross multiply
    1,144.92x = 1,579.46 × 725.16
  4. Step 4: Simplify right side
    1,144.92x = 1,145,361.21
  5. Step 5: Solve for x
    x = 1,145,361.21/1,144.92
  6. Step 6: Final answer
    x = 1,000.39

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Double scale
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1.5x scale

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.