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Finding the Fourth Proportional to 353.59, 530.48 and 221.97

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Solution

The fourth proportional to 353.59, 530.48 and 221.97 is: 333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.59 : 530.48 = 221.97 : x
  2. Step 2: Convert to fraction form
    353.59/530.48 = 221.97/x
  3. Step 3: Cross multiply
    353.59x = 530.48 × 221.97
  4. Step 4: Simplify right side
    353.59x = 117,750.65
  5. Step 5: Solve for x
    x = 117,750.65/353.59
  6. Step 6: Final answer
    x = 333.01

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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.