Home / 1,243.14-1,852.79-1,191.21

Finding the Fourth Proportional to 1,243.14, 1,852.79 and 1,191.21

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Solution

The fourth proportional to 1,243.14, 1,852.79 and 1,191.21 is: 1,775.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.14 : 1,852.79 = 1,191.21 : x
  2. Step 2: Convert to fraction form
    1,243.14/1,852.79 = 1,191.21/x
  3. Step 3: Cross multiply
    1,243.14x = 1,852.79 × 1,191.21
  4. Step 4: Simplify right side
    1,243.14x = 2,207,061.98
  5. Step 5: Solve for x
    x = 2,207,061.98/1,243.14
  6. Step 6: Final answer
    x = 1,775.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.