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Finding the Fourth Proportional to 882.28, 1,217.05 and 819.71

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Solution

The fourth proportional to 882.28, 1,217.05 and 819.71 is: 1,130.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.28 : 1,217.05 = 819.71 : x
  2. Step 2: Convert to fraction form
    882.28/1,217.05 = 819.71/x
  3. Step 3: Cross multiply
    882.28x = 1,217.05 × 819.71
  4. Step 4: Simplify right side
    882.28x = 997,628.06
  5. Step 5: Solve for x
    x = 997,628.06/882.28
  6. Step 6: Final answer
    x = 1,130.74

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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.