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Finding the Fourth Proportional to 836.28, 1,253.88 and 561.96

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Solution

The fourth proportional to 836.28, 1,253.88 and 561.96 is: 842.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.28 : 1,253.88 = 561.96 : x
  2. Step 2: Convert to fraction form
    836.28/1,253.88 = 561.96/x
  3. Step 3: Cross multiply
    836.28x = 1,253.88 × 561.96
  4. Step 4: Simplify right side
    836.28x = 704,630.40
  5. Step 5: Solve for x
    x = 704,630.40/836.28
  6. Step 6: Final answer
    x = 842.58

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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.