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Finding the Fourth Proportional to 888.12, 1,337.49 and 781.08

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Solution

The fourth proportional to 888.12, 1,337.49 and 781.08 is: 1,176.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.12 : 1,337.49 = 781.08 : x
  2. Step 2: Convert to fraction form
    888.12/1,337.49 = 781.08/x
  3. Step 3: Cross multiply
    888.12x = 1,337.49 × 781.08
  4. Step 4: Simplify right side
    888.12x = 1,044,686.69
  5. Step 5: Solve for x
    x = 1,044,686.69/888.12
  6. Step 6: Final answer
    x = 1,176.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.