Home / 2,121.48-3,180.85-889.47

Finding the Fourth Proportional to 2,121.48, 3,180.85 and 889.47

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Solution

The fourth proportional to 2,121.48, 3,180.85 and 889.47 is: 1,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.48 : 3,180.85 = 889.47 : x
  2. Step 2: Convert to fraction form
    2,121.48/3,180.85 = 889.47/x
  3. Step 3: Cross multiply
    2,121.48x = 3,180.85 × 889.47
  4. Step 4: Simplify right side
    2,121.48x = 2,829,270.65
  5. Step 5: Solve for x
    x = 2,829,270.65/2,121.48
  6. Step 6: Final answer
    x = 1,333.63

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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.