Home / 1,611.28-2,223.54-939.21

Finding the Fourth Proportional to 1,611.28, 2,223.54 and 939.21

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Solution

The fourth proportional to 1,611.28, 2,223.54 and 939.21 is: 1,296.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.28 : 2,223.54 = 939.21 : x
  2. Step 2: Convert to fraction form
    1,611.28/2,223.54 = 939.21/x
  3. Step 3: Cross multiply
    1,611.28x = 2,223.54 × 939.21
  4. Step 4: Simplify right side
    1,611.28x = 2,088,366.31
  5. Step 5: Solve for x
    x = 2,088,366.31/1,611.28
  6. Step 6: Final answer
    x = 1,296.09

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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.