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Finding the Fourth Proportional to 348.78, 520.22 and 342.30

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Solution

The fourth proportional to 348.78, 520.22 and 342.30 is: 510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.78 : 520.22 = 342.30 : x
  2. Step 2: Convert to fraction form
    348.78/520.22 = 342.30/x
  3. Step 3: Cross multiply
    348.78x = 520.22 × 342.30
  4. Step 4: Simplify right side
    348.78x = 178,069.59
  5. Step 5: Solve for x
    x = 178,069.59/348.78
  6. Step 6: Final answer
    x = 510.55

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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.