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Finding the Fourth Proportional to 427.42, 589.78 and 252.78

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Solution

The fourth proportional to 427.42, 589.78 and 252.78 is: 348.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.42 : 589.78 = 252.78 : x
  2. Step 2: Convert to fraction form
    427.42/589.78 = 252.78/x
  3. Step 3: Cross multiply
    427.42x = 589.78 × 252.78
  4. Step 4: Simplify right side
    427.42x = 149,084.59
  5. Step 5: Solve for x
    x = 149,084.59/427.42
  6. Step 6: Final answer
    x = 348.80

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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.