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Finding the Fourth Proportional to 827.25, 1,240.23 and 436.74

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Solution

The fourth proportional to 827.25, 1,240.23 and 436.74 is: 654.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.25 : 1,240.23 = 436.74 : x
  2. Step 2: Convert to fraction form
    827.25/1,240.23 = 436.74/x
  3. Step 3: Cross multiply
    827.25x = 1,240.23 × 436.74
  4. Step 4: Simplify right side
    827.25x = 541,658.05
  5. Step 5: Solve for x
    x = 541,658.05/827.25
  6. Step 6: Final answer
    x = 654.77

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Double scale
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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.