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Finding the Fourth Proportional to 416.07, 623.79 and 142.11

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Solution

The fourth proportional to 416.07, 623.79 and 142.11 is: 213.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.07 : 623.79 = 142.11 : x
  2. Step 2: Convert to fraction form
    416.07/623.79 = 142.11/x
  3. Step 3: Cross multiply
    416.07x = 623.79 × 142.11
  4. Step 4: Simplify right side
    416.07x = 88,646.80
  5. Step 5: Solve for x
    x = 88,646.80/416.07
  6. Step 6: Final answer
    x = 213.06

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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.