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Finding the Fourth Proportional to 427.30, 589.62 and 252.70

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Solution

The fourth proportional to 427.30, 589.62 and 252.70 is: 348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.30 : 589.62 = 252.70 : x
  2. Step 2: Convert to fraction form
    427.30/589.62 = 252.70/x
  3. Step 3: Cross multiply
    427.30x = 589.62 × 252.70
  4. Step 4: Simplify right side
    427.30x = 148,996.97
  5. Step 5: Solve for x
    x = 148,996.97/427.30
  6. Step 6: Final answer
    x = 348.69

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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.