Home / 2,195.91-3,030.21-1,287.63

Finding the Fourth Proportional to 2,195.91, 3,030.21 and 1,287.63

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Solution

The fourth proportional to 2,195.91, 3,030.21 and 1,287.63 is: 1,776.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.91 : 3,030.21 = 1,287.63 : x
  2. Step 2: Convert to fraction form
    2,195.91/3,030.21 = 1,287.63/x
  3. Step 3: Cross multiply
    2,195.91x = 3,030.21 × 1,287.63
  4. Step 4: Simplify right side
    2,195.91x = 3,901,789.30
  5. Step 5: Solve for x
    x = 3,901,789.30/2,195.91
  6. Step 6: Final answer
    x = 1,776.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.