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Finding the Fourth Proportional to 1,281.31, 1,768.22 and 833.35

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Solution

The fourth proportional to 1,281.31, 1,768.22 and 833.35 is: 1,150.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.31 : 1,768.22 = 833.35 : x
  2. Step 2: Convert to fraction form
    1,281.31/1,768.22 = 833.35/x
  3. Step 3: Cross multiply
    1,281.31x = 1,768.22 × 833.35
  4. Step 4: Simplify right side
    1,281.31x = 1,473,546.14
  5. Step 5: Solve for x
    x = 1,473,546.14/1,281.31
  6. Step 6: Final answer
    x = 1,150.03

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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.