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Finding the Fourth Proportional to 248.61, 372.31 and 140.34

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Solution

The fourth proportional to 248.61, 372.31 and 140.34 is: 210.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.61 : 372.31 = 140.34 : x
  2. Step 2: Convert to fraction form
    248.61/372.31 = 140.34/x
  3. Step 3: Cross multiply
    248.61x = 372.31 × 140.34
  4. Step 4: Simplify right side
    248.61x = 52,249.99
  5. Step 5: Solve for x
    x = 52,249.99/248.61
  6. Step 6: Final answer
    x = 210.17

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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.