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Finding the Fourth Proportional to 439.29, 659.34 and 277.07

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Solution

The fourth proportional to 439.29, 659.34 and 277.07 is: 415.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.29 : 659.34 = 277.07 : x
  2. Step 2: Convert to fraction form
    439.29/659.34 = 277.07/x
  3. Step 3: Cross multiply
    439.29x = 659.34 × 277.07
  4. Step 4: Simplify right side
    439.29x = 182,680.04
  5. Step 5: Solve for x
    x = 182,680.04/439.29
  6. Step 6: Final answer
    x = 415.85

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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.