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Finding the Fourth Proportional to 418.72, 577.88 and 252.99

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Solution

The fourth proportional to 418.72, 577.88 and 252.99 is: 349.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.72 : 577.88 = 252.99 : x
  2. Step 2: Convert to fraction form
    418.72/577.88 = 252.99/x
  3. Step 3: Cross multiply
    418.72x = 577.88 × 252.99
  4. Step 4: Simplify right side
    418.72x = 146,197.86
  5. Step 5: Solve for x
    x = 146,197.86/418.72
  6. Step 6: Final answer
    x = 349.15

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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.