Home / 2,040-2,815.84-1,211.84

Finding the Fourth Proportional to 2,040, 2,815.84 and 1,211.84

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Solution

The fourth proportional to 2,040, 2,815.84 and 1,211.84 is: 1,672.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,040 : 2,815.84 = 1,211.84 : x
  2. Step 2: Convert to fraction form
    2,040/2,815.84 = 1,211.84/x
  3. Step 3: Cross multiply
    2,040x = 2,815.84 × 1,211.84
  4. Step 4: Simplify right side
    2,040x = 3,412,347.55
  5. Step 5: Solve for x
    x = 3,412,347.55/2,040
  6. Step 6: Final answer
    x = 1,672.72

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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.