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Finding the Fourth Proportional to 2,305.40, 3,458.03 and 661.91

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Solution

The fourth proportional to 2,305.40, 3,458.03 and 661.91 is: 992.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.40 : 3,458.03 = 661.91 : x
  2. Step 2: Convert to fraction form
    2,305.40/3,458.03 = 661.91/x
  3. Step 3: Cross multiply
    2,305.40x = 3,458.03 × 661.91
  4. Step 4: Simplify right side
    2,305.40x = 2,288,884.04
  5. Step 5: Solve for x
    x = 2,288,884.04/2,305.40
  6. Step 6: Final answer
    x = 992.84

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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.