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Finding the Fourth Proportional to 348.50, 479.32 and 306.92

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Solution

The fourth proportional to 348.50, 479.32 and 306.92 is: 422.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.50 : 479.32 = 306.92 : x
  2. Step 2: Convert to fraction form
    348.50/479.32 = 306.92/x
  3. Step 3: Cross multiply
    348.50x = 479.32 × 306.92
  4. Step 4: Simplify right side
    348.50x = 147,113.33
  5. Step 5: Solve for x
    x = 147,113.33/348.50
  6. Step 6: Final answer
    x = 422.13

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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.