Home / 2,103.19-3,155.15-869.90

Finding the Fourth Proportional to 2,103.19, 3,155.15 and 869.90

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Solution

The fourth proportional to 2,103.19, 3,155.15 and 869.90 is: 1,305.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.19 : 3,155.15 = 869.90 : x
  2. Step 2: Convert to fraction form
    2,103.19/3,155.15 = 869.90/x
  3. Step 3: Cross multiply
    2,103.19x = 3,155.15 × 869.90
  4. Step 4: Simplify right side
    2,103.19x = 2,744,660.64
  5. Step 5: Solve for x
    x = 2,744,660.64/2,103.19
  6. Step 6: Final answer
    x = 1,305.00

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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.