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Finding the Fourth Proportional to 348.70, 520.95 and 308.56

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Solution

The fourth proportional to 348.70, 520.95 and 308.56 is: 460.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.70 : 520.95 = 308.56 : x
  2. Step 2: Convert to fraction form
    348.70/520.95 = 308.56/x
  3. Step 3: Cross multiply
    348.70x = 520.95 × 308.56
  4. Step 4: Simplify right side
    348.70x = 160,744.33
  5. Step 5: Solve for x
    x = 160,744.33/348.70
  6. Step 6: Final answer
    x = 460.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.