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Finding the Fourth Proportional to 439.08, 655.77 and 347.88

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Solution

The fourth proportional to 439.08, 655.77 and 347.88 is: 519.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.08 : 655.77 = 347.88 : x
  2. Step 2: Convert to fraction form
    439.08/655.77 = 347.88/x
  3. Step 3: Cross multiply
    439.08x = 655.77 × 347.88
  4. Step 4: Simplify right side
    439.08x = 228,129.27
  5. Step 5: Solve for x
    x = 228,129.27/439.08
  6. Step 6: Final answer
    x = 519.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.