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Finding the Fourth Proportional to 827.30, 1,240.84 and 300.15

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Solution

The fourth proportional to 827.30, 1,240.84 and 300.15 is: 450.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.30 : 1,240.84 = 300.15 : x
  2. Step 2: Convert to fraction form
    827.30/1,240.84 = 300.15/x
  3. Step 3: Cross multiply
    827.30x = 1,240.84 × 300.15
  4. Step 4: Simplify right side
    827.30x = 372,438.13
  5. Step 5: Solve for x
    x = 372,438.13/827.30
  6. Step 6: Final answer
    x = 450.19

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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.