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Finding the Fourth Proportional to 892.48, 1,338.24 and 649.60

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Solution

The fourth proportional to 892.48, 1,338.24 and 649.60 is: 974.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.48 : 1,338.24 = 649.60 : x
  2. Step 2: Convert to fraction form
    892.48/1,338.24 = 649.60/x
  3. Step 3: Cross multiply
    892.48x = 1,338.24 × 649.60
  4. Step 4: Simplify right side
    892.48x = 869,320.70
  5. Step 5: Solve for x
    x = 869,320.70/892.48
  6. Step 6: Final answer
    x = 974.05

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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.