Home / 2,121.55-3,180.67-1,010.40

Finding the Fourth Proportional to 2,121.55, 3,180.67 and 1,010.40

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Solution

The fourth proportional to 2,121.55, 3,180.67 and 1,010.40 is: 1,514.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.55 : 3,180.67 = 1,010.40 : x
  2. Step 2: Convert to fraction form
    2,121.55/3,180.67 = 1,010.40/x
  3. Step 3: Cross multiply
    2,121.55x = 3,180.67 × 1,010.40
  4. Step 4: Simplify right side
    2,121.55x = 3,213,733.06
  5. Step 5: Solve for x
    x = 3,213,733.06/2,121.55
  6. Step 6: Final answer
    x = 1,514.80

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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.