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Finding the Fourth Proportional to 485.46, 669.72 and 374.73

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Solution

The fourth proportional to 485.46, 669.72 and 374.73 is: 516.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.46 : 669.72 = 374.73 : x
  2. Step 2: Convert to fraction form
    485.46/669.72 = 374.73/x
  3. Step 3: Cross multiply
    485.46x = 669.72 × 374.73
  4. Step 4: Simplify right side
    485.46x = 250,964.18
  5. Step 5: Solve for x
    x = 250,964.18/485.46
  6. Step 6: Final answer
    x = 516.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.