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Finding the Fourth Proportional to 2,479.56, 3,719.10 and 919.56

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Solution

The fourth proportional to 2,479.56, 3,719.10 and 919.56 is: 1,379.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.56 : 3,719.10 = 919.56 : x
  2. Step 2: Convert to fraction form
    2,479.56/3,719.10 = 919.56/x
  3. Step 3: Cross multiply
    2,479.56x = 3,719.10 × 919.56
  4. Step 4: Simplify right side
    2,479.56x = 3,419,935.60
  5. Step 5: Solve for x
    x = 3,419,935.60/2,479.56
  6. Step 6: Final answer
    x = 1,379.25

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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.