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Finding the Fourth Proportional to 1,230.54, 1,846.56 and 711.56

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Solution

The fourth proportional to 1,230.54, 1,846.56 and 711.56 is: 1,067.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.54 : 1,846.56 = 711.56 : x
  2. Step 2: Convert to fraction form
    1,230.54/1,846.56 = 711.56/x
  3. Step 3: Cross multiply
    1,230.54x = 1,846.56 × 711.56
  4. Step 4: Simplify right side
    1,230.54x = 1,313,945.52
  5. Step 5: Solve for x
    x = 1,313,945.52/1,230.54
  6. Step 6: Final answer
    x = 1,067.78

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Double scale
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Similar ratio
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1.5x scale

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.