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Finding the Fourth Proportional to 439.54, 606.34 and 291.98

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Solution

The fourth proportional to 439.54, 606.34 and 291.98 is: 402.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.54 : 606.34 = 291.98 : x
  2. Step 2: Convert to fraction form
    439.54/606.34 = 291.98/x
  3. Step 3: Cross multiply
    439.54x = 606.34 × 291.98
  4. Step 4: Simplify right side
    439.54x = 177,039.15
  5. Step 5: Solve for x
    x = 177,039.15/439.54
  6. Step 6: Final answer
    x = 402.78

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Why These Related Problems?

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