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Finding the Fourth Proportional to 827.14, 1,141.59 and 630.28

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Solution

The fourth proportional to 827.14, 1,141.59 and 630.28 is: 869.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.14 : 1,141.59 = 630.28 : x
  2. Step 2: Convert to fraction form
    827.14/1,141.59 = 630.28/x
  3. Step 3: Cross multiply
    827.14x = 1,141.59 × 630.28
  4. Step 4: Simplify right side
    827.14x = 719,521.35
  5. Step 5: Solve for x
    x = 719,521.35/827.14
  6. Step 6: Final answer
    x = 869.89

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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.