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Finding the Fourth Proportional to 348.51, 480.75 and 310.62

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Solution

The fourth proportional to 348.51, 480.75 and 310.62 is: 428.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.51 : 480.75 = 310.62 : x
  2. Step 2: Convert to fraction form
    348.51/480.75 = 310.62/x
  3. Step 3: Cross multiply
    348.51x = 480.75 × 310.62
  4. Step 4: Simplify right side
    348.51x = 149,330.57
  5. Step 5: Solve for x
    x = 149,330.57/348.51
  6. Step 6: Final answer
    x = 428.48

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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.