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Finding the Fourth Proportional to 279.22, 416.06 and 272.23

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Solution

The fourth proportional to 279.22, 416.06 and 272.23 is: 405.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.22 : 416.06 = 272.23 : x
  2. Step 2: Convert to fraction form
    279.22/416.06 = 272.23/x
  3. Step 3: Cross multiply
    279.22x = 416.06 × 272.23
  4. Step 4: Simplify right side
    279.22x = 113,264.01
  5. Step 5: Solve for x
    x = 113,264.01/279.22
  6. Step 6: Final answer
    x = 405.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.