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Finding the Fourth Proportional to 694.52, 1,040.82 and 557

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Solution

The fourth proportional to 694.52, 1,040.82 and 557 is: 834.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.52 : 1,040.82 = 557 : x
  2. Step 2: Convert to fraction form
    694.52/1,040.82 = 557/x
  3. Step 3: Cross multiply
    694.52x = 1,040.82 × 557
  4. Step 4: Simplify right side
    694.52x = 579,736.74
  5. Step 5: Solve for x
    x = 579,736.74/694.52
  6. Step 6: Final answer
    x = 834.73

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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.