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Finding the Fourth Proportional to 418.41, 577.13 and 287.19

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Solution

The fourth proportional to 418.41, 577.13 and 287.19 is: 396.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.41 : 577.13 = 287.19 : x
  2. Step 2: Convert to fraction form
    418.41/577.13 = 287.19/x
  3. Step 3: Cross multiply
    418.41x = 577.13 × 287.19
  4. Step 4: Simplify right side
    418.41x = 165,744.53
  5. Step 5: Solve for x
    x = 165,744.53/418.41
  6. Step 6: Final answer
    x = 396.13

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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.