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Finding the Fourth Proportional to 416.19, 624.36 and 172.58

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Solution

The fourth proportional to 416.19, 624.36 and 172.58 is: 258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.19 : 624.36 = 172.58 : x
  2. Step 2: Convert to fraction form
    416.19/624.36 = 172.58/x
  3. Step 3: Cross multiply
    416.19x = 624.36 × 172.58
  4. Step 4: Simplify right side
    416.19x = 107,748.93
  5. Step 5: Solve for x
    x = 107,748.93/416.19
  6. Step 6: Final answer
    x = 258.89

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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.