Home / 2,187.42-3,018.53-1,243.09

Finding the Fourth Proportional to 2,187.42, 3,018.53 and 1,243.09

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Solution

The fourth proportional to 2,187.42, 3,018.53 and 1,243.09 is: 1,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.42 : 3,018.53 = 1,243.09 : x
  2. Step 2: Convert to fraction form
    2,187.42/3,018.53 = 1,243.09/x
  3. Step 3: Cross multiply
    2,187.42x = 3,018.53 × 1,243.09
  4. Step 4: Simplify right side
    2,187.42x = 3,752,293.80
  5. Step 5: Solve for x
    x = 3,752,293.80/2,187.42
  6. Step 6: Final answer
    x = 1,715.40

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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.