Home / 2,118.57-3,177.18-885.75

Finding the Fourth Proportional to 2,118.57, 3,177.18 and 885.75

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Solution

The fourth proportional to 2,118.57, 3,177.18 and 885.75 is: 1,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.57 : 3,177.18 = 885.75 : x
  2. Step 2: Convert to fraction form
    2,118.57/3,177.18 = 885.75/x
  3. Step 3: Cross multiply
    2,118.57x = 3,177.18 × 885.75
  4. Step 4: Simplify right side
    2,118.57x = 2,814,187.19
  5. Step 5: Solve for x
    x = 2,814,187.19/2,118.57
  6. Step 6: Final answer
    x = 1,328.34

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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.