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Finding the Fourth Proportional to 461.98, 693.08 and 218.38

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Solution

The fourth proportional to 461.98, 693.08 and 218.38 is: 327.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.98 : 693.08 = 218.38 : x
  2. Step 2: Convert to fraction form
    461.98/693.08 = 218.38/x
  3. Step 3: Cross multiply
    461.98x = 693.08 × 218.38
  4. Step 4: Simplify right side
    461.98x = 151,354.81
  5. Step 5: Solve for x
    x = 151,354.81/461.98
  6. Step 6: Final answer
    x = 327.62

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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.