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Finding the Fourth Proportional to 2,862.95, 3,950.78 and 1,684.80

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Solution

The fourth proportional to 2,862.95, 3,950.78 and 1,684.80 is: 2,324.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.95 : 3,950.78 = 1,684.80 : x
  2. Step 2: Convert to fraction form
    2,862.95/3,950.78 = 1,684.80/x
  3. Step 3: Cross multiply
    2,862.95x = 3,950.78 × 1,684.80
  4. Step 4: Simplify right side
    2,862.95x = 6,656,265.72
  5. Step 5: Solve for x
    x = 6,656,265.72/2,862.95
  6. Step 6: Final answer
    x = 2,324.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.