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Finding the Fourth Proportional to 370.91, 512.12 and 231.06

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Solution

The fourth proportional to 370.91, 512.12 and 231.06 is: 319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.91 : 512.12 = 231.06 : x
  2. Step 2: Convert to fraction form
    370.91/512.12 = 231.06/x
  3. Step 3: Cross multiply
    370.91x = 512.12 × 231.06
  4. Step 4: Simplify right side
    370.91x = 118,329.29
  5. Step 5: Solve for x
    x = 118,329.29/370.91
  6. Step 6: Final answer
    x = 319.02

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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.