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Finding the Fourth Proportional to 1,778.79, 2,454.36 and 992.67

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Solution

The fourth proportional to 1,778.79, 2,454.36 and 992.67 is: 1,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.79 : 2,454.36 = 992.67 : x
  2. Step 2: Convert to fraction form
    1,778.79/2,454.36 = 992.67/x
  3. Step 3: Cross multiply
    1,778.79x = 2,454.36 × 992.67
  4. Step 4: Simplify right side
    1,778.79x = 2,436,369.54
  5. Step 5: Solve for x
    x = 2,436,369.54/1,778.79
  6. Step 6: Final answer
    x = 1,369.68

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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.