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Finding the Fourth Proportional to 694.08, 1,039.92 and 531.28

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Solution

The fourth proportional to 694.08, 1,039.92 and 531.28 is: 796.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.08 : 1,039.92 = 531.28 : x
  2. Step 2: Convert to fraction form
    694.08/1,039.92 = 531.28/x
  3. Step 3: Cross multiply
    694.08x = 1,039.92 × 531.28
  4. Step 4: Simplify right side
    694.08x = 552,488.70
  5. Step 5: Solve for x
    x = 552,488.70/694.08
  6. Step 6: Final answer
    x = 796.00

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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.