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Finding the Fourth Proportional to 346.20, 519.33 and 153.78

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Solution

The fourth proportional to 346.20, 519.33 and 153.78 is: 230.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.20 : 519.33 = 153.78 : x
  2. Step 2: Convert to fraction form
    346.20/519.33 = 153.78/x
  3. Step 3: Cross multiply
    346.20x = 519.33 × 153.78
  4. Step 4: Simplify right side
    346.20x = 79,862.57
  5. Step 5: Solve for x
    x = 79,862.57/346.20
  6. Step 6: Final answer
    x = 230.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.