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Finding the Fourth Proportional to 462.18, 693.48 and 218.66

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Solution

The fourth proportional to 462.18, 693.48 and 218.66 is: 328.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.18 : 693.48 = 218.66 : x
  2. Step 2: Convert to fraction form
    462.18/693.48 = 218.66/x
  3. Step 3: Cross multiply
    462.18x = 693.48 × 218.66
  4. Step 4: Simplify right side
    462.18x = 151,636.34
  5. Step 5: Solve for x
    x = 151,636.34/462.18
  6. Step 6: Final answer
    x = 328.09

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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.