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Finding the Fourth Proportional to 984.92, 1,359.22 and 542.81

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Solution

The fourth proportional to 984.92, 1,359.22 and 542.81 is: 749.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.92 : 1,359.22 = 542.81 : x
  2. Step 2: Convert to fraction form
    984.92/1,359.22 = 542.81/x
  3. Step 3: Cross multiply
    984.92x = 1,359.22 × 542.81
  4. Step 4: Simplify right side
    984.92x = 737,790.06
  5. Step 5: Solve for x
    x = 737,790.06/984.92
  6. Step 6: Final answer
    x = 749.09

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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.