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Finding the Fourth Proportional to 416.08, 623.44 and 221.07

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Solution

The fourth proportional to 416.08, 623.44 and 221.07 is: 331.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.08 : 623.44 = 221.07 : x
  2. Step 2: Convert to fraction form
    416.08/623.44 = 221.07/x
  3. Step 3: Cross multiply
    416.08x = 623.44 × 221.07
  4. Step 4: Simplify right side
    416.08x = 137,823.88
  5. Step 5: Solve for x
    x = 137,823.88/416.08
  6. Step 6: Final answer
    x = 331.24

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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.