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Finding the Fourth Proportional to 415.34, 623.06 and 126.74

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Solution

The fourth proportional to 415.34, 623.06 and 126.74 is: 190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.34 : 623.06 = 126.74 : x
  2. Step 2: Convert to fraction form
    415.34/623.06 = 126.74/x
  3. Step 3: Cross multiply
    415.34x = 623.06 × 126.74
  4. Step 4: Simplify right side
    415.34x = 78,963.83
  5. Step 5: Solve for x
    x = 78,963.83/415.34
  6. Step 6: Final answer
    x = 190.12

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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.