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Finding the Fourth Proportional to 385.06, 577.32 and 211.54

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Solution

The fourth proportional to 385.06, 577.32 and 211.54 is: 317.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.06 : 577.32 = 211.54 : x
  2. Step 2: Convert to fraction form
    385.06/577.32 = 211.54/x
  3. Step 3: Cross multiply
    385.06x = 577.32 × 211.54
  4. Step 4: Simplify right side
    385.06x = 122,126.27
  5. Step 5: Solve for x
    x = 122,126.27/385.06
  6. Step 6: Final answer
    x = 317.16

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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.