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Finding the Fourth Proportional to 1,283.28, 1,923.24 and 512.88

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Solution

The fourth proportional to 1,283.28, 1,923.24 and 512.88 is: 768.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.28 : 1,923.24 = 512.88 : x
  2. Step 2: Convert to fraction form
    1,283.28/1,923.24 = 512.88/x
  3. Step 3: Cross multiply
    1,283.28x = 1,923.24 × 512.88
  4. Step 4: Simplify right side
    1,283.28x = 986,391.33
  5. Step 5: Solve for x
    x = 986,391.33/1,283.28
  6. Step 6: Final answer
    x = 768.65

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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.