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Finding the Fourth Proportional to 992.97, 1,369.13 and 805.87

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Solution

The fourth proportional to 992.97, 1,369.13 and 805.87 is: 1,111.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.97 : 1,369.13 = 805.87 : x
  2. Step 2: Convert to fraction form
    992.97/1,369.13 = 805.87/x
  3. Step 3: Cross multiply
    992.97x = 1,369.13 × 805.87
  4. Step 4: Simplify right side
    992.97x = 1,103,340.79
  5. Step 5: Solve for x
    x = 1,103,340.79/992.97
  6. Step 6: Final answer
    x = 1,111.15

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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.