Home / 2,141.18-3,213.39-909.45

Finding the Fourth Proportional to 2,141.18, 3,213.39 and 909.45

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Solution

The fourth proportional to 2,141.18, 3,213.39 and 909.45 is: 1,364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.18 : 3,213.39 = 909.45 : x
  2. Step 2: Convert to fraction form
    2,141.18/3,213.39 = 909.45/x
  3. Step 3: Cross multiply
    2,141.18x = 3,213.39 × 909.45
  4. Step 4: Simplify right side
    2,141.18x = 2,922,412.99
  5. Step 5: Solve for x
    x = 2,922,412.99/2,141.18
  6. Step 6: Final answer
    x = 1,364.86

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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.