Home / 2,869.18-3,960.78-2,205.80

Finding the Fourth Proportional to 2,869.18, 3,960.78 and 2,205.80

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Solution

The fourth proportional to 2,869.18, 3,960.78 and 2,205.80 is: 3,045.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.18 : 3,960.78 = 2,205.80 : x
  2. Step 2: Convert to fraction form
    2,869.18/3,960.78 = 2,205.80/x
  3. Step 3: Cross multiply
    2,869.18x = 3,960.78 × 2,205.80
  4. Step 4: Simplify right side
    2,869.18x = 8,736,688.52
  5. Step 5: Solve for x
    x = 8,736,688.52/2,869.18
  6. Step 6: Final answer
    x = 3,045.01

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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.