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Finding the Fourth Proportional to 348.02, 480.70 and 306.72

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Solution

The fourth proportional to 348.02, 480.70 and 306.72 is: 423.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.02 : 480.70 = 306.72 : x
  2. Step 2: Convert to fraction form
    348.02/480.70 = 306.72/x
  3. Step 3: Cross multiply
    348.02x = 480.70 × 306.72
  4. Step 4: Simplify right side
    348.02x = 147,440.30
  5. Step 5: Solve for x
    x = 147,440.30/348.02
  6. Step 6: Final answer
    x = 423.65

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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.