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Finding the Fourth Proportional to 439.61, 658.94 and 277.20

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Solution

The fourth proportional to 439.61, 658.94 and 277.20 is: 415.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.61 : 658.94 = 277.20 : x
  2. Step 2: Convert to fraction form
    439.61/658.94 = 277.20/x
  3. Step 3: Cross multiply
    439.61x = 658.94 × 277.20
  4. Step 4: Simplify right side
    439.61x = 182,656.78
  5. Step 5: Solve for x
    x = 182,656.78/439.61
  6. Step 6: Final answer
    x = 415.50

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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.