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Finding the Fourth Proportional to 2,572.13, 3,857.60 and 723.42

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Solution

The fourth proportional to 2,572.13, 3,857.60 and 723.42 is: 1,084.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.13 : 3,857.60 = 723.42 : x
  2. Step 2: Convert to fraction form
    2,572.13/3,857.60 = 723.42/x
  3. Step 3: Cross multiply
    2,572.13x = 3,857.60 × 723.42
  4. Step 4: Simplify right side
    2,572.13x = 2,790,666.80
  5. Step 5: Solve for x
    x = 2,790,666.80/2,572.13
  6. Step 6: Final answer
    x = 1,084.97

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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.