Home / 2,869.80-3,960.69-1,690.98

Finding the Fourth Proportional to 2,869.80, 3,960.69 and 1,690.98

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Solution

The fourth proportional to 2,869.80, 3,960.69 and 1,690.98 is: 2,333.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.80 : 3,960.69 = 1,690.98 : x
  2. Step 2: Convert to fraction form
    2,869.80/3,960.69 = 1,690.98/x
  3. Step 3: Cross multiply
    2,869.80x = 3,960.69 × 1,690.98
  4. Step 4: Simplify right side
    2,869.80x = 6,697,447.58
  5. Step 5: Solve for x
    x = 6,697,447.58/2,869.80
  6. Step 6: Final answer
    x = 2,333.77

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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.