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Finding the Fourth Proportional to 348.84, 480.42 and 321.48

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Solution

The fourth proportional to 348.84, 480.42 and 321.48 is: 442.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.84 : 480.42 = 321.48 : x
  2. Step 2: Convert to fraction form
    348.84/480.42 = 321.48/x
  3. Step 3: Cross multiply
    348.84x = 480.42 × 321.48
  4. Step 4: Simplify right side
    348.84x = 154,445.42
  5. Step 5: Solve for x
    x = 154,445.42/348.84
  6. Step 6: Final answer
    x = 442.74

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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.