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Finding the Fourth Proportional to 992.68, 1,369.88 and 550.56

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Solution

The fourth proportional to 992.68, 1,369.88 and 550.56 is: 759.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.68 : 1,369.88 = 550.56 : x
  2. Step 2: Convert to fraction form
    992.68/1,369.88 = 550.56/x
  3. Step 3: Cross multiply
    992.68x = 1,369.88 × 550.56
  4. Step 4: Simplify right side
    992.68x = 754,201.13
  5. Step 5: Solve for x
    x = 754,201.13/992.68
  6. Step 6: Final answer
    x = 759.76

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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.