Home / 2,162.90-2,985.05-1,278.79

Finding the Fourth Proportional to 2,162.90, 2,985.05 and 1,278.79

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Solution

The fourth proportional to 2,162.90, 2,985.05 and 1,278.79 is: 1,764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.90 : 2,985.05 = 1,278.79 : x
  2. Step 2: Convert to fraction form
    2,162.90/2,985.05 = 1,278.79/x
  3. Step 3: Cross multiply
    2,162.90x = 2,985.05 × 1,278.79
  4. Step 4: Simplify right side
    2,162.90x = 3,817,252.09
  5. Step 5: Solve for x
    x = 3,817,252.09/2,162.90
  6. Step 6: Final answer
    x = 1,764.88

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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.