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Finding the Fourth Proportional to 385.13, 577.78 and 222.48

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Solution

The fourth proportional to 385.13, 577.78 and 222.48 is: 333.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.13 : 577.78 = 222.48 : x
  2. Step 2: Convert to fraction form
    385.13/577.78 = 222.48/x
  3. Step 3: Cross multiply
    385.13x = 577.78 × 222.48
  4. Step 4: Simplify right side
    385.13x = 128,543.94
  5. Step 5: Solve for x
    x = 128,543.94/385.13
  6. Step 6: Final answer
    x = 333.77

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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.