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Finding the Fourth Proportional to 2,891.60, 4,337.40 and 2,405.60

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Solution

The fourth proportional to 2,891.60, 4,337.40 and 2,405.60 is: 3,608.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.60 : 4,337.40 = 2,405.60 : x
  2. Step 2: Convert to fraction form
    2,891.60/4,337.40 = 2,405.60/x
  3. Step 3: Cross multiply
    2,891.60x = 4,337.40 × 2,405.60
  4. Step 4: Simplify right side
    2,891.60x = 10,434,049.44
  5. Step 5: Solve for x
    x = 10,434,049.44/2,891.60
  6. Step 6: Final answer
    x = 3,608.40

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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.