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Finding the Fourth Proportional to 2,992.95, 4,489.63 and 912.97

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Solution

The fourth proportional to 2,992.95, 4,489.63 and 912.97 is: 1,369.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,992.95 : 4,489.63 = 912.97 : x
  2. Step 2: Convert to fraction form
    2,992.95/4,489.63 = 912.97/x
  3. Step 3: Cross multiply
    2,992.95x = 4,489.63 × 912.97
  4. Step 4: Simplify right side
    2,992.95x = 4,098,883.99
  5. Step 5: Solve for x
    x = 4,098,883.99/2,992.95
  6. Step 6: Final answer
    x = 1,369.51

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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.