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Finding the Fourth Proportional to 2,754.86, 4,133.82 and 2,139.80

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Solution

The fourth proportional to 2,754.86, 4,133.82 and 2,139.80 is: 3,210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,754.86 : 4,133.82 = 2,139.80 : x
  2. Step 2: Convert to fraction form
    2,754.86/4,133.82 = 2,139.80/x
  3. Step 3: Cross multiply
    2,754.86x = 4,133.82 × 2,139.80
  4. Step 4: Simplify right side
    2,754.86x = 8,845,548.04
  5. Step 5: Solve for x
    x = 8,845,548.04/2,754.86
  6. Step 6: Final answer
    x = 3,210.89

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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.