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Finding the Fourth Proportional to 5,384.39, 8,079.78 and 2,919.15

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Solution

The fourth proportional to 5,384.39, 8,079.78 and 2,919.15 is: 4,380.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,384.39 : 8,079.78 = 2,919.15 : x
  2. Step 2: Convert to fraction form
    5,384.39/8,079.78 = 2,919.15/x
  3. Step 3: Cross multiply
    5,384.39x = 8,079.78 × 2,919.15
  4. Step 4: Simplify right side
    5,384.39x = 23,586,089.79
  5. Step 5: Solve for x
    x = 23,586,089.79/5,384.39
  6. Step 6: Final answer
    x = 4,380.46

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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.