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Finding the Fourth Proportional to 385.14, 577.00 and 211.55

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Solution

The fourth proportional to 385.14, 577.00 and 211.55 is: 316.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.14 : 577.00 = 211.55 : x
  2. Step 2: Convert to fraction form
    385.14/577.00 = 211.55/x
  3. Step 3: Cross multiply
    385.14x = 577.00 × 211.55
  4. Step 4: Simplify right side
    385.14x = 122,060.94
  5. Step 5: Solve for x
    x = 122,060.94/385.14
  6. Step 6: Final answer
    x = 316.93

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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.