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Finding the Fourth Proportional to 842.61, 1,263.52 and 355.39

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Solution

The fourth proportional to 842.61, 1,263.52 and 355.39 is: 532.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.61 : 1,263.52 = 355.39 : x
  2. Step 2: Convert to fraction form
    842.61/1,263.52 = 355.39/x
  3. Step 3: Cross multiply
    842.61x = 1,263.52 × 355.39
  4. Step 4: Simplify right side
    842.61x = 449,042.37
  5. Step 5: Solve for x
    x = 449,042.37/842.61
  6. Step 6: Final answer
    x = 532.92

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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.