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Finding the Fourth Proportional to 418.68, 578.36 and 294.30

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Solution

The fourth proportional to 418.68, 578.36 and 294.30 is: 406.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.68 : 578.36 = 294.30 : x
  2. Step 2: Convert to fraction form
    418.68/578.36 = 294.30/x
  3. Step 3: Cross multiply
    418.68x = 578.36 × 294.30
  4. Step 4: Simplify right side
    418.68x = 170,209.88
  5. Step 5: Solve for x
    x = 170,209.88/418.68
  6. Step 6: Final answer
    x = 406.54

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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.