Home / 2,121.05-2,926.35-1,281.44

Finding the Fourth Proportional to 2,121.05, 2,926.35 and 1,281.44

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Solution

The fourth proportional to 2,121.05, 2,926.35 and 1,281.44 is: 1,767.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.05 : 2,926.35 = 1,281.44 : x
  2. Step 2: Convert to fraction form
    2,121.05/2,926.35 = 1,281.44/x
  3. Step 3: Cross multiply
    2,121.05x = 2,926.35 × 1,281.44
  4. Step 4: Simplify right side
    2,121.05x = 3,749,941.94
  5. Step 5: Solve for x
    x = 3,749,941.94/2,121.05
  6. Step 6: Final answer
    x = 1,767.96

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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.