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Finding the Fourth Proportional to 881.28, 1,323.64 and 649.27

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Solution

The fourth proportional to 881.28, 1,323.64 and 649.27 is: 975.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.28 : 1,323.64 = 649.27 : x
  2. Step 2: Convert to fraction form
    881.28/1,323.64 = 649.27/x
  3. Step 3: Cross multiply
    881.28x = 1,323.64 × 649.27
  4. Step 4: Simplify right side
    881.28x = 859,394.76
  5. Step 5: Solve for x
    x = 859,394.76/881.28
  6. Step 6: Final answer
    x = 975.17

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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.