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Finding the Fourth Proportional to 484.99, 668.99 and 418.87

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Solution

The fourth proportional to 484.99, 668.99 and 418.87 is: 577.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.99 : 668.99 = 418.87 : x
  2. Step 2: Convert to fraction form
    484.99/668.99 = 418.87/x
  3. Step 3: Cross multiply
    484.99x = 668.99 × 418.87
  4. Step 4: Simplify right side
    484.99x = 280,221.72
  5. Step 5: Solve for x
    x = 280,221.72/484.99
  6. Step 6: Final answer
    x = 577.79

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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.