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Finding the Fourth Proportional to 348.47, 479.12 and 310.79

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Solution

The fourth proportional to 348.47, 479.12 and 310.79 is: 427.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.47 : 479.12 = 310.79 : x
  2. Step 2: Convert to fraction form
    348.47/479.12 = 310.79/x
  3. Step 3: Cross multiply
    348.47x = 479.12 × 310.79
  4. Step 4: Simplify right side
    348.47x = 148,901.76
  5. Step 5: Solve for x
    x = 148,901.76/348.47
  6. Step 6: Final answer
    x = 427.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.