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Finding the Fourth Proportional to 371.90, 559.11 and 303.91

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Solution

The fourth proportional to 371.90, 559.11 and 303.91 is: 456.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.90 : 559.11 = 303.91 : x
  2. Step 2: Convert to fraction form
    371.90/559.11 = 303.91/x
  3. Step 3: Cross multiply
    371.90x = 559.11 × 303.91
  4. Step 4: Simplify right side
    371.90x = 169,921.15
  5. Step 5: Solve for x
    x = 169,921.15/371.90
  6. Step 6: Final answer
    x = 456.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.