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Finding the Fourth Proportional to 842.20, 1,261.58 and 532.95

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Solution

The fourth proportional to 842.20, 1,261.58 and 532.95 is: 798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.20 : 1,261.58 = 532.95 : x
  2. Step 2: Convert to fraction form
    842.20/1,261.58 = 532.95/x
  3. Step 3: Cross multiply
    842.20x = 1,261.58 × 532.95
  4. Step 4: Simplify right side
    842.20x = 672,351.67
  5. Step 5: Solve for x
    x = 672,351.67/842.20
  6. Step 6: Final answer
    x = 798.33

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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.