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Finding the Fourth Proportional to 418.19, 578.61 and 352.58

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Solution

The fourth proportional to 418.19, 578.61 and 352.58 is: 487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.19 : 578.61 = 352.58 : x
  2. Step 2: Convert to fraction form
    418.19/578.61 = 352.58/x
  3. Step 3: Cross multiply
    418.19x = 578.61 × 352.58
  4. Step 4: Simplify right side
    418.19x = 204,003.42
  5. Step 5: Solve for x
    x = 204,003.42/418.19
  6. Step 6: Final answer
    x = 487.83

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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.