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Finding the Fourth Proportional to 992.18, 1,484.75 and 731.57

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Solution

The fourth proportional to 992.18, 1,484.75 and 731.57 is: 1,094.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.18 : 1,484.75 = 731.57 : x
  2. Step 2: Convert to fraction form
    992.18/1,484.75 = 731.57/x
  3. Step 3: Cross multiply
    992.18x = 1,484.75 × 731.57
  4. Step 4: Simplify right side
    992.18x = 1,086,187.48
  5. Step 5: Solve for x
    x = 1,086,187.48/992.18
  6. Step 6: Final answer
    x = 1,094.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.