Home / 2,214.39-3,315.15-1,287.12

Finding the Fourth Proportional to 2,214.39, 3,315.15 and 1,287.12

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Solution

The fourth proportional to 2,214.39, 3,315.15 and 1,287.12 is: 1,926.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,214.39 : 3,315.15 = 1,287.12 : x
  2. Step 2: Convert to fraction form
    2,214.39/3,315.15 = 1,287.12/x
  3. Step 3: Cross multiply
    2,214.39x = 3,315.15 × 1,287.12
  4. Step 4: Simplify right side
    2,214.39x = 4,266,995.87
  5. Step 5: Solve for x
    x = 4,266,995.87/2,214.39
  6. Step 6: Final answer
    x = 1,926.94

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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.