Home / 2,120.96-2,926.08-1,281.44

Finding the Fourth Proportional to 2,120.96, 2,926.08 and 1,281.44

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Solution

The fourth proportional to 2,120.96, 2,926.08 and 1,281.44 is: 1,767.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.96 : 2,926.08 = 1,281.44 : x
  2. Step 2: Convert to fraction form
    2,120.96/2,926.08 = 1,281.44/x
  3. Step 3: Cross multiply
    2,120.96x = 2,926.08 × 1,281.44
  4. Step 4: Simplify right side
    2,120.96x = 3,749,595.96
  5. Step 5: Solve for x
    x = 3,749,595.96/2,120.96
  6. Step 6: Final answer
    x = 1,767.88

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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.