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Finding the Fourth Proportional to 378.95, 525.15 and 371.66

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Solution

The fourth proportional to 378.95, 525.15 and 371.66 is: 515.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.95 : 525.15 = 371.66 : x
  2. Step 2: Convert to fraction form
    378.95/525.15 = 371.66/x
  3. Step 3: Cross multiply
    378.95x = 525.15 × 371.66
  4. Step 4: Simplify right side
    378.95x = 195,175.39
  5. Step 5: Solve for x
    x = 195,175.39/378.95
  6. Step 6: Final answer
    x = 515.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.