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Finding the Fourth Proportional to 1,332.70, 1,839.20 and 743.24

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Solution

The fourth proportional to 1,332.70, 1,839.20 and 743.24 is: 1,025.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.70 : 1,839.20 = 743.24 : x
  2. Step 2: Convert to fraction form
    1,332.70/1,839.20 = 743.24/x
  3. Step 3: Cross multiply
    1,332.70x = 1,839.20 × 743.24
  4. Step 4: Simplify right side
    1,332.70x = 1,366,967.89
  5. Step 5: Solve for x
    x = 1,366,967.89/1,332.70
  6. Step 6: Final answer
    x = 1,025.72

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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.