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Finding the Fourth Proportional to 827.43, 1,141.43 and 561.89

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Solution

The fourth proportional to 827.43, 1,141.43 and 561.89 is: 775.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.43 : 1,141.43 = 561.89 : x
  2. Step 2: Convert to fraction form
    827.43/1,141.43 = 561.89/x
  3. Step 3: Cross multiply
    827.43x = 1,141.43 × 561.89
  4. Step 4: Simplify right side
    827.43x = 641,349.59
  5. Step 5: Solve for x
    x = 641,349.59/827.43
  6. Step 6: Final answer
    x = 775.11

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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.