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Finding the Fourth Proportional to 353.70, 530.42 and 216.78

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Solution

The fourth proportional to 353.70, 530.42 and 216.78 is: 325.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.70 : 530.42 = 216.78 : x
  2. Step 2: Convert to fraction form
    353.70/530.42 = 216.78/x
  3. Step 3: Cross multiply
    353.70x = 530.42 × 216.78
  4. Step 4: Simplify right side
    353.70x = 114,984.45
  5. Step 5: Solve for x
    x = 114,984.45/353.70
  6. Step 6: Final answer
    x = 325.09

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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.