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Finding the Fourth Proportional to 992.54, 1,487.43 and 905.97

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Solution

The fourth proportional to 992.54, 1,487.43 and 905.97 is: 1,357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.54 : 1,487.43 = 905.97 : x
  2. Step 2: Convert to fraction form
    992.54/1,487.43 = 905.97/x
  3. Step 3: Cross multiply
    992.54x = 1,487.43 × 905.97
  4. Step 4: Simplify right side
    992.54x = 1,347,566.96
  5. Step 5: Solve for x
    x = 1,347,566.96/992.54
  6. Step 6: Final answer
    x = 1,357.70

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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.