Home / 1,408.80-1,942.97-1,055.55

Finding the Fourth Proportional to 1,408.80, 1,942.97 and 1,055.55

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Solution

The fourth proportional to 1,408.80, 1,942.97 and 1,055.55 is: 1,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.80 : 1,942.97 = 1,055.55 : x
  2. Step 2: Convert to fraction form
    1,408.80/1,942.97 = 1,055.55/x
  3. Step 3: Cross multiply
    1,408.80x = 1,942.97 × 1,055.55
  4. Step 4: Simplify right side
    1,408.80x = 2,050,901.98
  5. Step 5: Solve for x
    x = 2,050,901.98/1,408.80
  6. Step 6: Final answer
    x = 1,455.78

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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.