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Finding the Fourth Proportional to 382.80, 525.28 and 379.16

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Solution

The fourth proportional to 382.80, 525.28 and 379.16 is: 520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.80 : 525.28 = 379.16 : x
  2. Step 2: Convert to fraction form
    382.80/525.28 = 379.16/x
  3. Step 3: Cross multiply
    382.80x = 525.28 × 379.16
  4. Step 4: Simplify right side
    382.80x = 199,165.16
  5. Step 5: Solve for x
    x = 199,165.16/382.80
  6. Step 6: Final answer
    x = 520.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.