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Finding the Fourth Proportional to 2,305.16, 3,457.22 and 661.34

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Solution

The fourth proportional to 2,305.16, 3,457.22 and 661.34 is: 991.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.16 : 3,457.22 = 661.34 : x
  2. Step 2: Convert to fraction form
    2,305.16/3,457.22 = 661.34/x
  3. Step 3: Cross multiply
    2,305.16x = 3,457.22 × 661.34
  4. Step 4: Simplify right side
    2,305.16x = 2,286,377.28
  5. Step 5: Solve for x
    x = 2,286,377.28/2,305.16
  6. Step 6: Final answer
    x = 991.85

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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.