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Finding the Fourth Proportional to 354.26, 530.61 and 216.89

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Solution

The fourth proportional to 354.26, 530.61 and 216.89 is: 324.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.26 : 530.61 = 216.89 : x
  2. Step 2: Convert to fraction form
    354.26/530.61 = 216.89/x
  3. Step 3: Cross multiply
    354.26x = 530.61 × 216.89
  4. Step 4: Simplify right side
    354.26x = 115,081.89
  5. Step 5: Solve for x
    x = 115,081.89/354.26
  6. Step 6: Final answer
    x = 324.86

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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.