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Finding the Fourth Proportional to 2,479.80, 3,720.78 and 1,019.28

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Solution

The fourth proportional to 2,479.80, 3,720.78 and 1,019.28 is: 1,529.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.80 : 3,720.78 = 1,019.28 : x
  2. Step 2: Convert to fraction form
    2,479.80/3,720.78 = 1,019.28/x
  3. Step 3: Cross multiply
    2,479.80x = 3,720.78 × 1,019.28
  4. Step 4: Simplify right side
    2,479.80x = 3,792,516.64
  5. Step 5: Solve for x
    x = 3,792,516.64/2,479.80
  6. Step 6: Final answer
    x = 1,529.36

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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.