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Finding the Fourth Proportional to 414.07, 621.20 and 125.50

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Solution

The fourth proportional to 414.07, 621.20 and 125.50 is: 188.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.07 : 621.20 = 125.50 : x
  2. Step 2: Convert to fraction form
    414.07/621.20 = 125.50/x
  3. Step 3: Cross multiply
    414.07x = 621.20 × 125.50
  4. Step 4: Simplify right side
    414.07x = 77,959.97
  5. Step 5: Solve for x
    x = 77,959.97/414.07
  6. Step 6: Final answer
    x = 188.28

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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.