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Finding the Fourth Proportional to 2,658.08, 3,989.18 and 1,343.18

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Solution

The fourth proportional to 2,658.08, 3,989.18 and 1,343.18 is: 2,015.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.08 : 3,989.18 = 1,343.18 : x
  2. Step 2: Convert to fraction form
    2,658.08/3,989.18 = 1,343.18/x
  3. Step 3: Cross multiply
    2,658.08x = 3,989.18 × 1,343.18
  4. Step 4: Simplify right side
    2,658.08x = 5,358,200.12
  5. Step 5: Solve for x
    x = 5,358,200.12/2,658.08
  6. Step 6: Final answer
    x = 2,015.81

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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.