Home / 2,195.40-3,029.38-1,311.01

Finding the Fourth Proportional to 2,195.40, 3,029.38 and 1,311.01

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Solution

The fourth proportional to 2,195.40, 3,029.38 and 1,311.01 is: 1,809.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.40 : 3,029.38 = 1,311.01 : x
  2. Step 2: Convert to fraction form
    2,195.40/3,029.38 = 1,311.01/x
  3. Step 3: Cross multiply
    2,195.40x = 3,029.38 × 1,311.01
  4. Step 4: Simplify right side
    2,195.40x = 3,971,547.47
  5. Step 5: Solve for x
    x = 3,971,547.47/2,195.40
  6. Step 6: Final answer
    x = 1,809.03

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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.