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Finding the Fourth Proportional to 347.87, 479.84 and 223.40

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Solution

The fourth proportional to 347.87, 479.84 and 223.40 is: 308.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.87 : 479.84 = 223.40 : x
  2. Step 2: Convert to fraction form
    347.87/479.84 = 223.40/x
  3. Step 3: Cross multiply
    347.87x = 479.84 × 223.40
  4. Step 4: Simplify right side
    347.87x = 107,192.74
  5. Step 5: Solve for x
    x = 107,192.74/347.87
  6. Step 6: Final answer
    x = 308.14

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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.