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Finding the Fourth Proportional to 371.74, 513.04 and 231.90

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Solution

The fourth proportional to 371.74, 513.04 and 231.90 is: 320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.74 : 513.04 = 231.90 : x
  2. Step 2: Convert to fraction form
    371.74/513.04 = 231.90/x
  3. Step 3: Cross multiply
    371.74x = 513.04 × 231.90
  4. Step 4: Simplify right side
    371.74x = 118,973.98
  5. Step 5: Solve for x
    x = 118,973.98/371.74
  6. Step 6: Final answer
    x = 320.05

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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.