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Finding the Fourth Proportional to 485.12, 669.02 and 374.42

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Solution

The fourth proportional to 485.12, 669.02 and 374.42 is: 516.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.12 : 669.02 = 374.42 : x
  2. Step 2: Convert to fraction form
    485.12/669.02 = 374.42/x
  3. Step 3: Cross multiply
    485.12x = 669.02 × 374.42
  4. Step 4: Simplify right side
    485.12x = 250,494.47
  5. Step 5: Solve for x
    x = 250,494.47/485.12
  6. Step 6: Final answer
    x = 516.36

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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.