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Finding the Fourth Proportional to 699.52, 963.55 and 581.28

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Solution

The fourth proportional to 699.52, 963.55 and 581.28 is: 800.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.52 : 963.55 = 581.28 : x
  2. Step 2: Convert to fraction form
    699.52/963.55 = 581.28/x
  3. Step 3: Cross multiply
    699.52x = 963.55 × 581.28
  4. Step 4: Simplify right side
    699.52x = 560,092.34
  5. Step 5: Solve for x
    x = 560,092.34/699.52
  6. Step 6: Final answer
    x = 800.68

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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.