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Finding the Fourth Proportional to 2,472.80, 3,709.20 and 741

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Solution

The fourth proportional to 2,472.80, 3,709.20 and 741 is: 1,111.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,472.80 : 3,709.20 = 741 : x
  2. Step 2: Convert to fraction form
    2,472.80/3,709.20 = 741/x
  3. Step 3: Cross multiply
    2,472.80x = 3,709.20 × 741
  4. Step 4: Simplify right side
    2,472.80x = 2,748,517.20
  5. Step 5: Solve for x
    x = 2,748,517.20/2,472.80
  6. Step 6: Final answer
    x = 1,111.50

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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.