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Finding the Fourth Proportional to 1,255.88, 1,731.26 and 881.72

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Solution

The fourth proportional to 1,255.88, 1,731.26 and 881.72 is: 1,215.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.88 : 1,731.26 = 881.72 : x
  2. Step 2: Convert to fraction form
    1,255.88/1,731.26 = 881.72/x
  3. Step 3: Cross multiply
    1,255.88x = 1,731.26 × 881.72
  4. Step 4: Simplify right side
    1,255.88x = 1,526,486.57
  5. Step 5: Solve for x
    x = 1,526,486.57/1,255.88
  6. Step 6: Final answer
    x = 1,215.47

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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.