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Finding the Fourth Proportional to 348.22, 479.46 and 315.82

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Solution

The fourth proportional to 348.22, 479.46 and 315.82 is: 434.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.22 : 479.46 = 315.82 : x
  2. Step 2: Convert to fraction form
    348.22/479.46 = 315.82/x
  3. Step 3: Cross multiply
    348.22x = 479.46 × 315.82
  4. Step 4: Simplify right side
    348.22x = 151,423.06
  5. Step 5: Solve for x
    x = 151,423.06/348.22
  6. Step 6: Final answer
    x = 434.85

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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.