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Finding the Fourth Proportional to 485.22, 668.33 and 372.97

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Solution

The fourth proportional to 485.22, 668.33 and 372.97 is: 513.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.22 : 668.33 = 372.97 : x
  2. Step 2: Convert to fraction form
    485.22/668.33 = 372.97/x
  3. Step 3: Cross multiply
    485.22x = 668.33 × 372.97
  4. Step 4: Simplify right side
    485.22x = 249,265.66
  5. Step 5: Solve for x
    x = 249,265.66/485.22
  6. Step 6: Final answer
    x = 513.72

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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.