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Finding the Fourth Proportional to 492.83, 739.21 and 287.27

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Solution

The fourth proportional to 492.83, 739.21 and 287.27 is: 430.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.83 : 739.21 = 287.27 : x
  2. Step 2: Convert to fraction form
    492.83/739.21 = 287.27/x
  3. Step 3: Cross multiply
    492.83x = 739.21 × 287.27
  4. Step 4: Simplify right side
    492.83x = 212,352.86
  5. Step 5: Solve for x
    x = 212,352.86/492.83
  6. Step 6: Final answer
    x = 430.88

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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.