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Finding the Fourth Proportional to 293.58, 439.74 and 149.40

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Solution

The fourth proportional to 293.58, 439.74 and 149.40 is: 223.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.58 : 439.74 = 149.40 : x
  2. Step 2: Convert to fraction form
    293.58/439.74 = 149.40/x
  3. Step 3: Cross multiply
    293.58x = 439.74 × 149.40
  4. Step 4: Simplify right side
    293.58x = 65,697.16
  5. Step 5: Solve for x
    x = 65,697.16/293.58
  6. Step 6: Final answer
    x = 223.78

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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.