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Finding the Fourth Proportional to 2,506.80, 3,760.80 and 1,274.40

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Solution

The fourth proportional to 2,506.80, 3,760.80 and 1,274.40 is: 1,911.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,506.80 : 3,760.80 = 1,274.40 : x
  2. Step 2: Convert to fraction form
    2,506.80/3,760.80 = 1,274.40/x
  3. Step 3: Cross multiply
    2,506.80x = 3,760.80 × 1,274.40
  4. Step 4: Simplify right side
    2,506.80x = 4,792,763.52
  5. Step 5: Solve for x
    x = 4,792,763.52/2,506.80
  6. Step 6: Final answer
    x = 1,911.91

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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.