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Finding the Fourth Proportional to 355.59, 534.15 and 218.97

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Solution

The fourth proportional to 355.59, 534.15 and 218.97 is: 328.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.59 : 534.15 = 218.97 : x
  2. Step 2: Convert to fraction form
    355.59/534.15 = 218.97/x
  3. Step 3: Cross multiply
    355.59x = 534.15 × 218.97
  4. Step 4: Simplify right side
    355.59x = 116,962.83
  5. Step 5: Solve for x
    x = 116,962.83/355.59
  6. Step 6: Final answer
    x = 328.93

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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.