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Finding the Fourth Proportional to 2,862.84, 3,948.57 and 1,919.70

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Solution

The fourth proportional to 2,862.84, 3,948.57 and 1,919.70 is: 2,647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.84 : 3,948.57 = 1,919.70 : x
  2. Step 2: Convert to fraction form
    2,862.84/3,948.57 = 1,919.70/x
  3. Step 3: Cross multiply
    2,862.84x = 3,948.57 × 1,919.70
  4. Step 4: Simplify right side
    2,862.84x = 7,580,069.83
  5. Step 5: Solve for x
    x = 7,580,069.83/2,862.84
  6. Step 6: Final answer
    x = 2,647.74

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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.