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Finding the Fourth Proportional to 1,013.97, 1,399.89 and 908.88

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Solution

The fourth proportional to 1,013.97, 1,399.89 and 908.88 is: 1,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.97 : 1,399.89 = 908.88 : x
  2. Step 2: Convert to fraction form
    1,013.97/1,399.89 = 908.88/x
  3. Step 3: Cross multiply
    1,013.97x = 1,399.89 × 908.88
  4. Step 4: Simplify right side
    1,013.97x = 1,272,332.02
  5. Step 5: Solve for x
    x = 1,272,332.02/1,013.97
  6. Step 6: Final answer
    x = 1,254.80

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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.