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Finding the Fourth Proportional to 2,305.23, 3,456.78 and 661.38

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Solution

The fourth proportional to 2,305.23, 3,456.78 and 661.38 is: 991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.23 : 3,456.78 = 661.38 : x
  2. Step 2: Convert to fraction form
    2,305.23/3,456.78 = 661.38/x
  3. Step 3: Cross multiply
    2,305.23x = 3,456.78 × 661.38
  4. Step 4: Simplify right side
    2,305.23x = 2,286,245.16
  5. Step 5: Solve for x
    x = 2,286,245.16/2,305.23
  6. Step 6: Final answer
    x = 991.76

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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.