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Finding the Fourth Proportional to 418.20, 573.65 and 414.55

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Solution

The fourth proportional to 418.20, 573.65 and 414.55 is: 568.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.20 : 573.65 = 414.55 : x
  2. Step 2: Convert to fraction form
    418.20/573.65 = 414.55/x
  3. Step 3: Cross multiply
    418.20x = 573.65 × 414.55
  4. Step 4: Simplify right side
    418.20x = 237,806.61
  5. Step 5: Solve for x
    x = 237,806.61/418.20
  6. Step 6: Final answer
    x = 568.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.