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Finding the Fourth Proportional to 1,561.92, 2,155.84 and 941.44

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Solution

The fourth proportional to 1,561.92, 2,155.84 and 941.44 is: 1,299.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.92 : 2,155.84 = 941.44 : x
  2. Step 2: Convert to fraction form
    1,561.92/2,155.84 = 941.44/x
  3. Step 3: Cross multiply
    1,561.92x = 2,155.84 × 941.44
  4. Step 4: Simplify right side
    1,561.92x = 2,029,594.01
  5. Step 5: Solve for x
    x = 2,029,594.01/1,561.92
  6. Step 6: Final answer
    x = 1,299.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.