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Finding the Fourth Proportional to 347.70, 479.25 and 319.44

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Solution

The fourth proportional to 347.70, 479.25 and 319.44 is: 440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.70 : 479.25 = 319.44 : x
  2. Step 2: Convert to fraction form
    347.70/479.25 = 319.44/x
  3. Step 3: Cross multiply
    347.70x = 479.25 × 319.44
  4. Step 4: Simplify right side
    347.70x = 153,091.62
  5. Step 5: Solve for x
    x = 153,091.62/347.70
  6. Step 6: Final answer
    x = 440.30

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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.