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Finding the Fourth Proportional to 2,868.78, 4,301.74 and 920.73

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Solution

The fourth proportional to 2,868.78, 4,301.74 and 920.73 is: 1,380.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.78 : 4,301.74 = 920.73 : x
  2. Step 2: Convert to fraction form
    2,868.78/4,301.74 = 920.73/x
  3. Step 3: Cross multiply
    2,868.78x = 4,301.74 × 920.73
  4. Step 4: Simplify right side
    2,868.78x = 3,960,741.07
  5. Step 5: Solve for x
    x = 3,960,741.07/2,868.78
  6. Step 6: Final answer
    x = 1,380.64

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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.