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Finding the Fourth Proportional to 293.20, 439.86 and 171.40

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Solution

The fourth proportional to 293.20, 439.86 and 171.40 is: 257.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.20 : 439.86 = 171.40 : x
  2. Step 2: Convert to fraction form
    293.20/439.86 = 171.40/x
  3. Step 3: Cross multiply
    293.20x = 439.86 × 171.40
  4. Step 4: Simplify right side
    293.20x = 75,392.00
  5. Step 5: Solve for x
    x = 75,392.00/293.20
  6. Step 6: Final answer
    x = 257.14

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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.