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Finding the Fourth Proportional to 827.64, 1,141.90 and 547.79

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Solution

The fourth proportional to 827.64, 1,141.90 and 547.79 is: 755.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.64 : 1,141.90 = 547.79 : x
  2. Step 2: Convert to fraction form
    827.64/1,141.90 = 547.79/x
  3. Step 3: Cross multiply
    827.64x = 1,141.90 × 547.79
  4. Step 4: Simplify right side
    827.64x = 625,514.32
  5. Step 5: Solve for x
    x = 625,514.32/827.64
  6. Step 6: Final answer
    x = 755.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.