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Finding the Fourth Proportional to 385.78, 577.87 and 180.53

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Solution

The fourth proportional to 385.78, 577.87 and 180.53 is: 270.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.78 : 577.87 = 180.53 : x
  2. Step 2: Convert to fraction form
    385.78/577.87 = 180.53/x
  3. Step 3: Cross multiply
    385.78x = 577.87 × 180.53
  4. Step 4: Simplify right side
    385.78x = 104,322.87
  5. Step 5: Solve for x
    x = 104,322.87/385.78
  6. Step 6: Final answer
    x = 270.42

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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.