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Finding the Fourth Proportional to 3,955.79, 5,459.31 and 2,187.96

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Solution

The fourth proportional to 3,955.79, 5,459.31 and 2,187.96 is: 3,019.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,955.79 : 5,459.31 = 2,187.96 : x
  2. Step 2: Convert to fraction form
    3,955.79/5,459.31 = 2,187.96/x
  3. Step 3: Cross multiply
    3,955.79x = 5,459.31 × 2,187.96
  4. Step 4: Simplify right side
    3,955.79x = 11,944,751.91
  5. Step 5: Solve for x
    x = 11,944,751.91/3,955.79
  6. Step 6: Final answer
    x = 3,019.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.