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Finding the Fourth Proportional to 3,844.80, 5,767.20 and 2,678.40

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Solution

The fourth proportional to 3,844.80, 5,767.20 and 2,678.40 is: 4,017.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,844.80 : 5,767.20 = 2,678.40 : x
  2. Step 2: Convert to fraction form
    3,844.80/5,767.20 = 2,678.40/x
  3. Step 3: Cross multiply
    3,844.80x = 5,767.20 × 2,678.40
  4. Step 4: Simplify right side
    3,844.80x = 15,446,868.48
  5. Step 5: Solve for x
    x = 15,446,868.48/3,844.80
  6. Step 6: Final answer
    x = 4,017.60

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1.5x scale

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.