Home / 2,120.96-2,927.36-1,189.76

Finding the Fourth Proportional to 2,120.96, 2,927.36 and 1,189.76

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Solution

The fourth proportional to 2,120.96, 2,927.36 and 1,189.76 is: 1,642.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.96 : 2,927.36 = 1,189.76 : x
  2. Step 2: Convert to fraction form
    2,120.96/2,927.36 = 1,189.76/x
  3. Step 3: Cross multiply
    2,120.96x = 2,927.36 × 1,189.76
  4. Step 4: Simplify right side
    2,120.96x = 3,482,855.83
  5. Step 5: Solve for x
    x = 3,482,855.83/2,120.96
  6. Step 6: Final answer
    x = 1,642.11

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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.