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Finding the Fourth Proportional to 416, 624.20 and 159.68

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Solution

The fourth proportional to 416, 624.20 and 159.68 is: 239.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    416 : 624.20 = 159.68 : x
  2. Step 2: Convert to fraction form
    416/624.20 = 159.68/x
  3. Step 3: Cross multiply
    416x = 624.20 × 159.68
  4. Step 4: Simplify right side
    416x = 99,672.26
  5. Step 5: Solve for x
    x = 99,672.26/416
  6. Step 6: Final answer
    x = 239.60

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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.