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Finding the Fourth Proportional to 2,139.92, 2,950.80 and 2,133.44

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Solution

The fourth proportional to 2,139.92, 2,950.80 and 2,133.44 is: 2,941.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.92 : 2,950.80 = 2,133.44 : x
  2. Step 2: Convert to fraction form
    2,139.92/2,950.80 = 2,133.44/x
  3. Step 3: Cross multiply
    2,139.92x = 2,950.80 × 2,133.44
  4. Step 4: Simplify right side
    2,139.92x = 6,295,354.75
  5. Step 5: Solve for x
    x = 6,295,354.75/2,139.92
  6. Step 6: Final answer
    x = 2,941.86

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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.