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Finding the Fourth Proportional to 1,889.60, 2,834.40 and 1,403.60

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Solution

The fourth proportional to 1,889.60, 2,834.40 and 1,403.60 is: 2,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.60 : 2,834.40 = 1,403.60 : x
  2. Step 2: Convert to fraction form
    1,889.60/2,834.40 = 1,403.60/x
  3. Step 3: Cross multiply
    1,889.60x = 2,834.40 × 1,403.60
  4. Step 4: Simplify right side
    1,889.60x = 3,978,363.84
  5. Step 5: Solve for x
    x = 3,978,363.84/1,889.60
  6. Step 6: Final answer
    x = 2,105.40

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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.