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Finding the Fourth Proportional to 385.20, 577.78 and 96.62

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Solution

The fourth proportional to 385.20, 577.78 and 96.62 is: 144.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.20 : 577.78 = 96.62 : x
  2. Step 2: Convert to fraction form
    385.20/577.78 = 96.62/x
  3. Step 3: Cross multiply
    385.20x = 577.78 × 96.62
  4. Step 4: Simplify right side
    385.20x = 55,825.10
  5. Step 5: Solve for x
    x = 55,825.10/385.20
  6. Step 6: Final answer
    x = 144.92

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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.