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Finding the Fourth Proportional to 252.40, 377.70 and 230.80

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Solution

The fourth proportional to 252.40, 377.70 and 230.80 is: 345.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.40 : 377.70 = 230.80 : x
  2. Step 2: Convert to fraction form
    252.40/377.70 = 230.80/x
  3. Step 3: Cross multiply
    252.40x = 377.70 × 230.80
  4. Step 4: Simplify right side
    252.40x = 87,173.16
  5. Step 5: Solve for x
    x = 87,173.16/252.40
  6. Step 6: Final answer
    x = 345.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.