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Finding the Fourth Proportional to 439.35, 659.96 and 277.15

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Solution

The fourth proportional to 439.35, 659.96 and 277.15 is: 416.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.35 : 659.96 = 277.15 : x
  2. Step 2: Convert to fraction form
    439.35/659.96 = 277.15/x
  3. Step 3: Cross multiply
    439.35x = 659.96 × 277.15
  4. Step 4: Simplify right side
    439.35x = 182,907.91
  5. Step 5: Solve for x
    x = 182,907.91/439.35
  6. Step 6: Final answer
    x = 416.31

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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.