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Finding the Fourth Proportional to 416.62, 625.65 and 255.25

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Solution

The fourth proportional to 416.62, 625.65 and 255.25 is: 383.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.62 : 625.65 = 255.25 : x
  2. Step 2: Convert to fraction form
    416.62/625.65 = 255.25/x
  3. Step 3: Cross multiply
    416.62x = 625.65 × 255.25
  4. Step 4: Simplify right side
    416.62x = 159,697.16
  5. Step 5: Solve for x
    x = 159,697.16/416.62
  6. Step 6: Final answer
    x = 383.32

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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.