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Finding the Fourth Proportional to 1,305.12, 1,957.06 and 757.47

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Solution

The fourth proportional to 1,305.12, 1,957.06 and 757.47 is: 1,135.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.12 : 1,957.06 = 757.47 : x
  2. Step 2: Convert to fraction form
    1,305.12/1,957.06 = 757.47/x
  3. Step 3: Cross multiply
    1,305.12x = 1,957.06 × 757.47
  4. Step 4: Simplify right side
    1,305.12x = 1,482,414.24
  5. Step 5: Solve for x
    x = 1,482,414.24/1,305.12
  6. Step 6: Final answer
    x = 1,135.85

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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.