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Finding the Fourth Proportional to 347.36, 479.68 and 231.20

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Solution

The fourth proportional to 347.36, 479.68 and 231.20 is: 319.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.36 : 479.68 = 231.20 : x
  2. Step 2: Convert to fraction form
    347.36/479.68 = 231.20/x
  3. Step 3: Cross multiply
    347.36x = 479.68 × 231.20
  4. Step 4: Simplify right side
    347.36x = 110,902.02
  5. Step 5: Solve for x
    x = 110,902.02/347.36
  6. Step 6: Final answer
    x = 319.27

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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.