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Finding the Fourth Proportional to 427.71, 590.24 and 231.22

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Solution

The fourth proportional to 427.71, 590.24 and 231.22 is: 319.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.71 : 590.24 = 231.22 : x
  2. Step 2: Convert to fraction form
    427.71/590.24 = 231.22/x
  3. Step 3: Cross multiply
    427.71x = 590.24 × 231.22
  4. Step 4: Simplify right side
    427.71x = 136,476.61
  5. Step 5: Solve for x
    x = 136,476.61/427.71
  6. Step 6: Final answer
    x = 319.08

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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.