Home / 1,885-2,821.80-1,263.72

Finding the Fourth Proportional to 1,885, 2,821.80 and 1,263.72

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Solution

The fourth proportional to 1,885, 2,821.80 and 1,263.72 is: 1,891.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885 : 2,821.80 = 1,263.72 : x
  2. Step 2: Convert to fraction form
    1,885/2,821.80 = 1,263.72/x
  3. Step 3: Cross multiply
    1,885x = 2,821.80 × 1,263.72
  4. Step 4: Simplify right side
    1,885x = 3,565,965.10
  5. Step 5: Solve for x
    x = 3,565,965.10/1,885
  6. Step 6: Final answer
    x = 1,891.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.