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Finding the Fourth Proportional to 1,608.38, 2,412.55 and 512.73

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Solution

The fourth proportional to 1,608.38, 2,412.55 and 512.73 is: 769.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.38 : 2,412.55 = 512.73 : x
  2. Step 2: Convert to fraction form
    1,608.38/2,412.55 = 512.73/x
  3. Step 3: Cross multiply
    1,608.38x = 2,412.55 × 512.73
  4. Step 4: Simplify right side
    1,608.38x = 1,236,985.48
  5. Step 5: Solve for x
    x = 1,236,985.48/1,608.38
  6. Step 6: Final answer
    x = 769.09

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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.