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Finding the Fourth Proportional to 418.56, 578.18 and 302.73

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Solution

The fourth proportional to 418.56, 578.18 and 302.73 is: 418.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.56 : 578.18 = 302.73 : x
  2. Step 2: Convert to fraction form
    418.56/578.18 = 302.73/x
  3. Step 3: Cross multiply
    418.56x = 578.18 × 302.73
  4. Step 4: Simplify right side
    418.56x = 175,032.43
  5. Step 5: Solve for x
    x = 175,032.43/418.56
  6. Step 6: Final answer
    x = 418.18

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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.