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Finding the Fourth Proportional to 347.42, 479.72 and 326.77

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Solution

The fourth proportional to 347.42, 479.72 and 326.77 is: 451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.42 : 479.72 = 326.77 : x
  2. Step 2: Convert to fraction form
    347.42/479.72 = 326.77/x
  3. Step 3: Cross multiply
    347.42x = 479.72 × 326.77
  4. Step 4: Simplify right side
    347.42x = 156,757.72
  5. Step 5: Solve for x
    x = 156,757.72/347.42
  6. Step 6: Final answer
    x = 451.20

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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.