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Finding the Fourth Proportional to 2,475.40, 3,713.12 and 743.92

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Solution

The fourth proportional to 2,475.40, 3,713.12 and 743.92 is: 1,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,475.40 : 3,713.12 = 743.92 : x
  2. Step 2: Convert to fraction form
    2,475.40/3,713.12 = 743.92/x
  3. Step 3: Cross multiply
    2,475.40x = 3,713.12 × 743.92
  4. Step 4: Simplify right side
    2,475.40x = 2,762,264.23
  5. Step 5: Solve for x
    x = 2,762,264.23/2,475.40
  6. Step 6: Final answer
    x = 1,115.89

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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.