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Finding the Fourth Proportional to 293.92, 440.54 and 172.30

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Solution

The fourth proportional to 293.92, 440.54 and 172.30 is: 258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.92 : 440.54 = 172.30 : x
  2. Step 2: Convert to fraction form
    293.92/440.54 = 172.30/x
  3. Step 3: Cross multiply
    293.92x = 440.54 × 172.30
  4. Step 4: Simplify right side
    293.92x = 75,905.04
  5. Step 5: Solve for x
    x = 75,905.04/293.92
  6. Step 6: Final answer
    x = 258.25

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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.