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Finding the Fourth Proportional to 842.58, 1,263.92 and 355.14

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Solution

The fourth proportional to 842.58, 1,263.92 and 355.14 is: 532.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.58 : 1,263.92 = 355.14 : x
  2. Step 2: Convert to fraction form
    842.58/1,263.92 = 355.14/x
  3. Step 3: Cross multiply
    842.58x = 1,263.92 × 355.14
  4. Step 4: Simplify right side
    842.58x = 448,866.77
  5. Step 5: Solve for x
    x = 448,866.77/842.58
  6. Step 6: Final answer
    x = 532.73

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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.