Home / 2,121.23-3,181.45-888.31

Finding the Fourth Proportional to 2,121.23, 3,181.45 and 888.31

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Solution

The fourth proportional to 2,121.23, 3,181.45 and 888.31 is: 1,332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.23 : 3,181.45 = 888.31 : x
  2. Step 2: Convert to fraction form
    2,121.23/3,181.45 = 888.31/x
  3. Step 3: Cross multiply
    2,121.23x = 3,181.45 × 888.31
  4. Step 4: Simplify right side
    2,121.23x = 2,826,113.85
  5. Step 5: Solve for x
    x = 2,826,113.85/2,121.23
  6. Step 6: Final answer
    x = 1,332.30

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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.