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Finding the Fourth Proportional to 827.52, 1,239.66 and 534.60

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Solution

The fourth proportional to 827.52, 1,239.66 and 534.60 is: 800.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.52 : 1,239.66 = 534.60 : x
  2. Step 2: Convert to fraction form
    827.52/1,239.66 = 534.60/x
  3. Step 3: Cross multiply
    827.52x = 1,239.66 × 534.60
  4. Step 4: Simplify right side
    827.52x = 662,722.24
  5. Step 5: Solve for x
    x = 662,722.24/827.52
  6. Step 6: Final answer
    x = 800.85

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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.