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Finding the Fourth Proportional to 2,169.60, 3,254.40 and 2,105.60

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Solution

The fourth proportional to 2,169.60, 3,254.40 and 2,105.60 is: 3,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.60 : 3,254.40 = 2,105.60 : x
  2. Step 2: Convert to fraction form
    2,169.60/3,254.40 = 2,105.60/x
  3. Step 3: Cross multiply
    2,169.60x = 3,254.40 × 2,105.60
  4. Step 4: Simplify right side
    2,169.60x = 6,852,464.64
  5. Step 5: Solve for x
    x = 6,852,464.64/2,169.60
  6. Step 6: Final answer
    x = 3,158.40

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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.