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Finding the Fourth Proportional to 1,380.28, 2,071.50 and 833.08

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Solution

The fourth proportional to 1,380.28, 2,071.50 and 833.08 is: 1,250.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.28 : 2,071.50 = 833.08 : x
  2. Step 2: Convert to fraction form
    1,380.28/2,071.50 = 833.08/x
  3. Step 3: Cross multiply
    1,380.28x = 2,071.50 × 833.08
  4. Step 4: Simplify right side
    1,380.28x = 1,725,725.22
  5. Step 5: Solve for x
    x = 1,725,725.22/1,380.28
  6. Step 6: Final answer
    x = 1,250.27

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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.