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Finding the Fourth Proportional to 3,808.56, 5,708.40 and 3,116.40

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Solution

The fourth proportional to 3,808.56, 5,708.40 and 3,116.40 is: 4,670.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.56 : 5,708.40 = 3,116.40 : x
  2. Step 2: Convert to fraction form
    3,808.56/5,708.40 = 3,116.40/x
  3. Step 3: Cross multiply
    3,808.56x = 5,708.40 × 3,116.40
  4. Step 4: Simplify right side
    3,808.56x = 17,789,657.76
  5. Step 5: Solve for x
    x = 17,789,657.76/3,808.56
  6. Step 6: Final answer
    x = 4,670.97

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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.