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Finding the Fourth Proportional to 414.48, 621.60 and 154.47

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Solution

The fourth proportional to 414.48, 621.60 and 154.47 is: 231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.48 : 621.60 = 154.47 : x
  2. Step 2: Convert to fraction form
    414.48/621.60 = 154.47/x
  3. Step 3: Cross multiply
    414.48x = 621.60 × 154.47
  4. Step 4: Simplify right side
    414.48x = 96,018.55
  5. Step 5: Solve for x
    x = 96,018.55/414.48
  6. Step 6: Final answer
    x = 231.66

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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.