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Finding the Fourth Proportional to 427.20, 589.60 and 252.56

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Solution

The fourth proportional to 427.20, 589.60 and 252.56 is: 348.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.20 : 589.60 = 252.56 : x
  2. Step 2: Convert to fraction form
    427.20/589.60 = 252.56/x
  3. Step 3: Cross multiply
    427.20x = 589.60 × 252.56
  4. Step 4: Simplify right side
    427.20x = 148,909.38
  5. Step 5: Solve for x
    x = 148,909.38/427.20
  6. Step 6: Final answer
    x = 348.57

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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.