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Finding the Fourth Proportional to 923.52, 1,274.44 and 628.88

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Solution

The fourth proportional to 923.52, 1,274.44 and 628.88 is: 867.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.52 : 1,274.44 = 628.88 : x
  2. Step 2: Convert to fraction form
    923.52/1,274.44 = 628.88/x
  3. Step 3: Cross multiply
    923.52x = 1,274.44 × 628.88
  4. Step 4: Simplify right side
    923.52x = 801,469.83
  5. Step 5: Solve for x
    x = 801,469.83/923.52
  6. Step 6: Final answer
    x = 867.84

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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.