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Finding the Fourth Proportional to 385.14, 578.01 and 141.83

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Solution

The fourth proportional to 385.14, 578.01 and 141.83 is: 212.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.14 : 578.01 = 141.83 : x
  2. Step 2: Convert to fraction form
    385.14/578.01 = 141.83/x
  3. Step 3: Cross multiply
    385.14x = 578.01 × 141.83
  4. Step 4: Simplify right side
    385.14x = 81,976.27
  5. Step 5: Solve for x
    x = 81,976.27/385.14
  6. Step 6: Final answer
    x = 212.85

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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.