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Finding the Fourth Proportional to 1,332.68, 1,839.12 and 743.28

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Solution

The fourth proportional to 1,332.68, 1,839.12 and 743.28 is: 1,025.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.68 : 1,839.12 = 743.28 : x
  2. Step 2: Convert to fraction form
    1,332.68/1,839.12 = 743.28/x
  3. Step 3: Cross multiply
    1,332.68x = 1,839.12 × 743.28
  4. Step 4: Simplify right side
    1,332.68x = 1,366,981.11
  5. Step 5: Solve for x
    x = 1,366,981.11/1,332.68
  6. Step 6: Final answer
    x = 1,025.74

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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.