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Finding the Fourth Proportional to 439.92, 607.07 and 243.42

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Solution

The fourth proportional to 439.92, 607.07 and 243.42 is: 335.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.92 : 607.07 = 243.42 : x
  2. Step 2: Convert to fraction form
    439.92/607.07 = 243.42/x
  3. Step 3: Cross multiply
    439.92x = 607.07 × 243.42
  4. Step 4: Simplify right side
    439.92x = 147,771.76
  5. Step 5: Solve for x
    x = 147,771.76/439.92
  6. Step 6: Final answer
    x = 335.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.