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Finding the Fourth Proportional to 827.56, 1,240.62 and 340.27

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Solution

The fourth proportional to 827.56, 1,240.62 and 340.27 is: 510.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.56 : 1,240.62 = 340.27 : x
  2. Step 2: Convert to fraction form
    827.56/1,240.62 = 340.27/x
  3. Step 3: Cross multiply
    827.56x = 1,240.62 × 340.27
  4. Step 4: Simplify right side
    827.56x = 422,145.77
  5. Step 5: Solve for x
    x = 422,145.77/827.56
  6. Step 6: Final answer
    x = 510.11

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1.5x scale

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.