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Finding the Fourth Proportional to 347.55, 479.28 and 212.92

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Solution

The fourth proportional to 347.55, 479.28 and 212.92 is: 293.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.55 : 479.28 = 212.92 : x
  2. Step 2: Convert to fraction form
    347.55/479.28 = 212.92/x
  3. Step 3: Cross multiply
    347.55x = 479.28 × 212.92
  4. Step 4: Simplify right side
    347.55x = 102,048.30
  5. Step 5: Solve for x
    x = 102,048.30/347.55
  6. Step 6: Final answer
    x = 293.62

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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.