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Finding the Fourth Proportional to 252.30, 345.90 and 247.68

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Solution

The fourth proportional to 252.30, 345.90 and 247.68 is: 339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.30 : 345.90 = 247.68 : x
  2. Step 2: Convert to fraction form
    252.30/345.90 = 247.68/x
  3. Step 3: Cross multiply
    252.30x = 345.90 × 247.68
  4. Step 4: Simplify right side
    252.30x = 85,672.51
  5. Step 5: Solve for x
    x = 85,672.51/252.30
  6. Step 6: Final answer
    x = 339.57

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.