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Finding the Fourth Proportional to 402.62, 555.62 and 218.62

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Solution

The fourth proportional to 402.62, 555.62 and 218.62 is: 301.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.62 : 555.62 = 218.62 : x
  2. Step 2: Convert to fraction form
    402.62/555.62 = 218.62/x
  3. Step 3: Cross multiply
    402.62x = 555.62 × 218.62
  4. Step 4: Simplify right side
    402.62x = 121,469.64
  5. Step 5: Solve for x
    x = 121,469.64/402.62
  6. Step 6: Final answer
    x = 301.70

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