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Finding the Fourth Proportional to 675.45, 932.18 and 380.75

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Solution

The fourth proportional to 675.45, 932.18 and 380.75 is: 525.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.45 : 932.18 = 380.75 : x
  2. Step 2: Convert to fraction form
    675.45/932.18 = 380.75/x
  3. Step 3: Cross multiply
    675.45x = 932.18 × 380.75
  4. Step 4: Simplify right side
    675.45x = 354,920.97
  5. Step 5: Solve for x
    x = 354,920.97/675.45
  6. Step 6: Final answer
    x = 525.46

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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.