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Finding the Fourth Proportional to 418.77, 577.83 and 286.11

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Solution

The fourth proportional to 418.77, 577.83 and 286.11 is: 394.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.77 : 577.83 = 286.11 : x
  2. Step 2: Convert to fraction form
    418.77/577.83 = 286.11/x
  3. Step 3: Cross multiply
    418.77x = 577.83 × 286.11
  4. Step 4: Simplify right side
    418.77x = 165,322.94
  5. Step 5: Solve for x
    x = 165,322.94/418.77
  6. Step 6: Final answer
    x = 394.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.