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Finding the Fourth Proportional to 293.48, 439.96 and 149.28

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Solution

The fourth proportional to 293.48, 439.96 and 149.28 is: 223.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.48 : 439.96 = 149.28 : x
  2. Step 2: Convert to fraction form
    293.48/439.96 = 149.28/x
  3. Step 3: Cross multiply
    293.48x = 439.96 × 149.28
  4. Step 4: Simplify right side
    293.48x = 65,677.23
  5. Step 5: Solve for x
    x = 65,677.23/293.48
  6. Step 6: Final answer
    x = 223.79

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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.