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Finding the Fourth Proportional to 414.18, 617.55 and 406.89

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Solution

The fourth proportional to 414.18, 617.55 and 406.89 is: 606.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.18 : 617.55 = 406.89 : x
  2. Step 2: Convert to fraction form
    414.18/617.55 = 406.89/x
  3. Step 3: Cross multiply
    414.18x = 617.55 × 406.89
  4. Step 4: Simplify right side
    414.18x = 251,274.92
  5. Step 5: Solve for x
    x = 251,274.92/414.18
  6. Step 6: Final answer
    x = 606.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.