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Finding the Fourth Proportional to 882.14, 1,320.45 and 651.28

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Solution

The fourth proportional to 882.14, 1,320.45 and 651.28 is: 974.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.14 : 1,320.45 = 651.28 : x
  2. Step 2: Convert to fraction form
    882.14/1,320.45 = 651.28/x
  3. Step 3: Cross multiply
    882.14x = 1,320.45 × 651.28
  4. Step 4: Simplify right side
    882.14x = 859,982.68
  5. Step 5: Solve for x
    x = 859,982.68/882.14
  6. Step 6: Final answer
    x = 974.88

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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.