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Finding the Fourth Proportional to 1,778.20, 2,453.91 and 992.27

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Solution

The fourth proportional to 1,778.20, 2,453.91 and 992.27 is: 1,369.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.20 : 2,453.91 = 992.27 : x
  2. Step 2: Convert to fraction form
    1,778.20/2,453.91 = 992.27/x
  3. Step 3: Cross multiply
    1,778.20x = 2,453.91 × 992.27
  4. Step 4: Simplify right side
    1,778.20x = 2,434,941.28
  5. Step 5: Solve for x
    x = 2,434,941.28/1,778.20
  6. Step 6: Final answer
    x = 1,369.33

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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.