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Finding the Fourth Proportional to 391.82, 543.18 and 371.01

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Solution

The fourth proportional to 391.82, 543.18 and 371.01 is: 514.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.82 : 543.18 = 371.01 : x
  2. Step 2: Convert to fraction form
    391.82/543.18 = 371.01/x
  3. Step 3: Cross multiply
    391.82x = 543.18 × 371.01
  4. Step 4: Simplify right side
    391.82x = 201,525.21
  5. Step 5: Solve for x
    x = 201,525.21/391.82
  6. Step 6: Final answer
    x = 514.34

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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.