Home / 2,120.08-3,178.58-887.85

Finding the Fourth Proportional to 2,120.08, 3,178.58 and 887.85

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Solution

The fourth proportional to 2,120.08, 3,178.58 and 887.85 is: 1,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.08 : 3,178.58 = 887.85 : x
  2. Step 2: Convert to fraction form
    2,120.08/3,178.58 = 887.85/x
  3. Step 3: Cross multiply
    2,120.08x = 3,178.58 × 887.85
  4. Step 4: Simplify right side
    2,120.08x = 2,822,102.25
  5. Step 5: Solve for x
    x = 2,822,102.25/2,120.08
  6. Step 6: Final answer
    x = 1,331.13

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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.