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Finding the Fourth Proportional to 1,305.20, 1,957.05 and 1,151.43

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Solution

The fourth proportional to 1,305.20, 1,957.05 and 1,151.43 is: 1,726.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.20 : 1,957.05 = 1,151.43 : x
  2. Step 2: Convert to fraction form
    1,305.20/1,957.05 = 1,151.43/x
  3. Step 3: Cross multiply
    1,305.20x = 1,957.05 × 1,151.43
  4. Step 4: Simplify right side
    1,305.20x = 2,253,406.08
  5. Step 5: Solve for x
    x = 2,253,406.08/1,305.20
  6. Step 6: Final answer
    x = 1,726.49

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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.