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Finding the Fourth Proportional to 385.70, 579.07 and 229.82

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Solution

The fourth proportional to 385.70, 579.07 and 229.82 is: 345.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.70 : 579.07 = 229.82 : x
  2. Step 2: Convert to fraction form
    385.70/579.07 = 229.82/x
  3. Step 3: Cross multiply
    385.70x = 579.07 × 229.82
  4. Step 4: Simplify right side
    385.70x = 133,077.82
  5. Step 5: Solve for x
    x = 133,077.82/385.70
  6. Step 6: Final answer
    x = 345.03

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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.