Home / 2,187.10-3,278.81-953.57

Finding the Fourth Proportional to 2,187.10, 3,278.81 and 953.57

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Solution

The fourth proportional to 2,187.10, 3,278.81 and 953.57 is: 1,429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.10 : 3,278.81 = 953.57 : x
  2. Step 2: Convert to fraction form
    2,187.10/3,278.81 = 953.57/x
  3. Step 3: Cross multiply
    2,187.10x = 3,278.81 × 953.57
  4. Step 4: Simplify right side
    2,187.10x = 3,126,585.43
  5. Step 5: Solve for x
    x = 3,126,585.43/2,187.10
  6. Step 6: Final answer
    x = 1,429.56

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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.