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Finding the Fourth Proportional to 416.66, 625.26 and 279.86

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Solution

The fourth proportional to 416.66, 625.26 and 279.86 is: 419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.66 : 625.26 = 279.86 : x
  2. Step 2: Convert to fraction form
    416.66/625.26 = 279.86/x
  3. Step 3: Cross multiply
    416.66x = 625.26 × 279.86
  4. Step 4: Simplify right side
    416.66x = 174,985.26
  5. Step 5: Solve for x
    x = 174,985.26/416.66
  6. Step 6: Final answer
    x = 419.97

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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.