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Finding the Fourth Proportional to 415, 621.24 and 276.94

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Solution

The fourth proportional to 415, 621.24 and 276.94 is: 414.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    415 : 621.24 = 276.94 : x
  2. Step 2: Convert to fraction form
    415/621.24 = 276.94/x
  3. Step 3: Cross multiply
    415x = 621.24 × 276.94
  4. Step 4: Simplify right side
    415x = 172,046.21
  5. Step 5: Solve for x
    x = 172,046.21/415
  6. Step 6: Final answer
    x = 414.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.