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Finding the Fourth Proportional to 1,255.16, 1,731.56 and 757.48

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Solution

The fourth proportional to 1,255.16, 1,731.56 and 757.48 is: 1,044.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.16 : 1,731.56 = 757.48 : x
  2. Step 2: Convert to fraction form
    1,255.16/1,731.56 = 757.48/x
  3. Step 3: Cross multiply
    1,255.16x = 1,731.56 × 757.48
  4. Step 4: Simplify right side
    1,255.16x = 1,311,622.07
  5. Step 5: Solve for x
    x = 1,311,622.07/1,255.16
  6. Step 6: Final answer
    x = 1,044.98

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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.