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Finding the Fourth Proportional to 415.27, 621.69 and 277.98

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Solution

The fourth proportional to 415.27, 621.69 and 277.98 is: 416.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.27 : 621.69 = 277.98 : x
  2. Step 2: Convert to fraction form
    415.27/621.69 = 277.98/x
  3. Step 3: Cross multiply
    415.27x = 621.69 × 277.98
  4. Step 4: Simplify right side
    415.27x = 172,817.39
  5. Step 5: Solve for x
    x = 172,817.39/415.27
  6. Step 6: Final answer
    x = 416.16

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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.