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Finding the Fourth Proportional to 416.33, 624.36 and 172.79

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Solution

The fourth proportional to 416.33, 624.36 and 172.79 is: 259.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.33 : 624.36 = 172.79 : x
  2. Step 2: Convert to fraction form
    416.33/624.36 = 172.79/x
  3. Step 3: Cross multiply
    416.33x = 624.36 × 172.79
  4. Step 4: Simplify right side
    416.33x = 107,883.16
  5. Step 5: Solve for x
    x = 107,883.16/416.33
  6. Step 6: Final answer
    x = 259.13

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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.