Home / 2,167.80-3,251.40-869.28

Finding the Fourth Proportional to 2,167.80, 3,251.40 and 869.28

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Solution

The fourth proportional to 2,167.80, 3,251.40 and 869.28 is: 1,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.80 : 3,251.40 = 869.28 : x
  2. Step 2: Convert to fraction form
    2,167.80/3,251.40 = 869.28/x
  3. Step 3: Cross multiply
    2,167.80x = 3,251.40 × 869.28
  4. Step 4: Simplify right side
    2,167.80x = 2,826,376.99
  5. Step 5: Solve for x
    x = 2,826,376.99/2,167.80
  6. Step 6: Final answer
    x = 1,303.80

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1.5x scale

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.