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Finding the Fourth Proportional to 492.83, 739.19 and 261.68

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Solution

The fourth proportional to 492.83, 739.19 and 261.68 is: 392.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.83 : 739.19 = 261.68 : x
  2. Step 2: Convert to fraction form
    492.83/739.19 = 261.68/x
  3. Step 3: Cross multiply
    492.83x = 739.19 × 261.68
  4. Step 4: Simplify right side
    492.83x = 193,426.23
  5. Step 5: Solve for x
    x = 193,426.23/492.83
  6. Step 6: Final answer
    x = 392.48

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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.