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Finding the Fourth Proportional to 2,191.91, 3,287.93 and 711.19

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Solution

The fourth proportional to 2,191.91, 3,287.93 and 711.19 is: 1,066.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.91 : 3,287.93 = 711.19 : x
  2. Step 2: Convert to fraction form
    2,191.91/3,287.93 = 711.19/x
  3. Step 3: Cross multiply
    2,191.91x = 3,287.93 × 711.19
  4. Step 4: Simplify right side
    2,191.91x = 2,338,342.94
  5. Step 5: Solve for x
    x = 2,338,342.94/2,191.91
  6. Step 6: Final answer
    x = 1,066.81

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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.