Home / 2,127.15-3,190.44-810.54

Finding the Fourth Proportional to 2,127.15, 3,190.44 and 810.54

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Solution

The fourth proportional to 2,127.15, 3,190.44 and 810.54 is: 1,215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.15 : 3,190.44 = 810.54 : x
  2. Step 2: Convert to fraction form
    2,127.15/3,190.44 = 810.54/x
  3. Step 3: Cross multiply
    2,127.15x = 3,190.44 × 810.54
  4. Step 4: Simplify right side
    2,127.15x = 2,585,979.24
  5. Step 5: Solve for x
    x = 2,585,979.24/2,127.15
  6. Step 6: Final answer
    x = 1,215.70

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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.