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Finding the Fourth Proportional to 827.37, 1,240.09 and 339.82

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Solution

The fourth proportional to 827.37, 1,240.09 and 339.82 is: 509.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.37 : 1,240.09 = 339.82 : x
  2. Step 2: Convert to fraction form
    827.37/1,240.09 = 339.82/x
  3. Step 3: Cross multiply
    827.37x = 1,240.09 × 339.82
  4. Step 4: Simplify right side
    827.37x = 421,407.38
  5. Step 5: Solve for x
    x = 421,407.38/827.37
  6. Step 6: Final answer
    x = 509.33

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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.