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Finding the Fourth Proportional to 827.38, 1,239.68 and 582.72

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Solution

The fourth proportional to 827.38, 1,239.68 and 582.72 is: 873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.38 : 1,239.68 = 582.72 : x
  2. Step 2: Convert to fraction form
    827.38/1,239.68 = 582.72/x
  3. Step 3: Cross multiply
    827.38x = 1,239.68 × 582.72
  4. Step 4: Simplify right side
    827.38x = 722,386.33
  5. Step 5: Solve for x
    x = 722,386.33/827.38
  6. Step 6: Final answer
    x = 873.10

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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.