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Finding the Fourth Proportional to 418.21, 624.77 and 270.76

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Solution

The fourth proportional to 418.21, 624.77 and 270.76 is: 404.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.21 : 624.77 = 270.76 : x
  2. Step 2: Convert to fraction form
    418.21/624.77 = 270.76/x
  3. Step 3: Cross multiply
    418.21x = 624.77 × 270.76
  4. Step 4: Simplify right side
    418.21x = 169,159.15
  5. Step 5: Solve for x
    x = 169,159.15/418.21
  6. Step 6: Final answer
    x = 404.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.