Home / 1,771.92-2,655.45-1,121.49

Finding the Fourth Proportional to 1,771.92, 2,655.45 and 1,121.49

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Solution

The fourth proportional to 1,771.92, 2,655.45 and 1,121.49 is: 1,680.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.92 : 2,655.45 = 1,121.49 : x
  2. Step 2: Convert to fraction form
    1,771.92/2,655.45 = 1,121.49/x
  3. Step 3: Cross multiply
    1,771.92x = 2,655.45 × 1,121.49
  4. Step 4: Simplify right side
    1,771.92x = 2,978,060.62
  5. Step 5: Solve for x
    x = 2,978,060.62/1,771.92
  6. Step 6: Final answer
    x = 1,680.70

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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.