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Finding the Fourth Proportional to 2,862.20, 4,292.90 and 914.60

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Solution

The fourth proportional to 2,862.20, 4,292.90 and 914.60 is: 1,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.20 : 4,292.90 = 914.60 : x
  2. Step 2: Convert to fraction form
    2,862.20/4,292.90 = 914.60/x
  3. Step 3: Cross multiply
    2,862.20x = 4,292.90 × 914.60
  4. Step 4: Simplify right side
    2,862.20x = 3,926,286.34
  5. Step 5: Solve for x
    x = 3,926,286.34/2,862.20
  6. Step 6: Final answer
    x = 1,371.77

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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.