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Finding the Fourth Proportional to 842.31, 1,263.60 and 294.48

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Solution

The fourth proportional to 842.31, 1,263.60 and 294.48 is: 441.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.31 : 1,263.60 = 294.48 : x
  2. Step 2: Convert to fraction form
    842.31/1,263.60 = 294.48/x
  3. Step 3: Cross multiply
    842.31x = 1,263.60 × 294.48
  4. Step 4: Simplify right side
    842.31x = 372,104.93
  5. Step 5: Solve for x
    x = 372,104.93/842.31
  6. Step 6: Final answer
    x = 441.77

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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.