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Finding the Fourth Proportional to 1,778.14, 2,453.82 and 992.20

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Solution

The fourth proportional to 1,778.14, 2,453.82 and 992.20 is: 1,369.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.14 : 2,453.82 = 992.20 : x
  2. Step 2: Convert to fraction form
    1,778.14/2,453.82 = 992.20/x
  3. Step 3: Cross multiply
    1,778.14x = 2,453.82 × 992.20
  4. Step 4: Simplify right side
    1,778.14x = 2,434,680.20
  5. Step 5: Solve for x
    x = 2,434,680.20/1,778.14
  6. Step 6: Final answer
    x = 1,369.23

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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.