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Finding the Fourth Proportional to 1,944.68, 2,913.78 and 847.40

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Solution

The fourth proportional to 1,944.68, 2,913.78 and 847.40 is: 1,269.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,944.68 : 2,913.78 = 847.40 : x
  2. Step 2: Convert to fraction form
    1,944.68/2,913.78 = 847.40/x
  3. Step 3: Cross multiply
    1,944.68x = 2,913.78 × 847.40
  4. Step 4: Simplify right side
    1,944.68x = 2,469,137.17
  5. Step 5: Solve for x
    x = 2,469,137.17/1,944.68
  6. Step 6: Final answer
    x = 1,269.69

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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.