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Finding the Fourth Proportional to 930.98, 1,283.28 and 754.20

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Solution

The fourth proportional to 930.98, 1,283.28 and 754.20 is: 1,039.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.98 : 1,283.28 = 754.20 : x
  2. Step 2: Convert to fraction form
    930.98/1,283.28 = 754.20/x
  3. Step 3: Cross multiply
    930.98x = 1,283.28 × 754.20
  4. Step 4: Simplify right side
    930.98x = 967,849.78
  5. Step 5: Solve for x
    x = 967,849.78/930.98
  6. Step 6: Final answer
    x = 1,039.61

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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.