Home / 2,127.15-3,189.70-810.96

Finding the Fourth Proportional to 2,127.15, 3,189.70 and 810.96

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Solution

The fourth proportional to 2,127.15, 3,189.70 and 810.96 is: 1,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.15 : 3,189.70 = 810.96 : x
  2. Step 2: Convert to fraction form
    2,127.15/3,189.70 = 810.96/x
  3. Step 3: Cross multiply
    2,127.15x = 3,189.70 × 810.96
  4. Step 4: Simplify right side
    2,127.15x = 2,586,719.11
  5. Step 5: Solve for x
    x = 2,586,719.11/2,127.15
  6. Step 6: Final answer
    x = 1,216.05

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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.