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Finding the Fourth Proportional to 2,939.06, 4,408.80 and 992.64

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Solution

The fourth proportional to 2,939.06, 4,408.80 and 992.64 is: 1,489.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.06 : 4,408.80 = 992.64 : x
  2. Step 2: Convert to fraction form
    2,939.06/4,408.80 = 992.64/x
  3. Step 3: Cross multiply
    2,939.06x = 4,408.80 × 992.64
  4. Step 4: Simplify right side
    2,939.06x = 4,376,351.23
  5. Step 5: Solve for x
    x = 4,376,351.23/2,939.06
  6. Step 6: Final answer
    x = 1,489.03

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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.