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Finding the Fourth Proportional to 279, 415.26 and 272.16

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Solution

The fourth proportional to 279, 415.26 and 272.16 is: 405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 415.26 = 272.16 : x
  2. Step 2: Convert to fraction form
    279/415.26 = 272.16/x
  3. Step 3: Cross multiply
    279x = 415.26 × 272.16
  4. Step 4: Simplify right side
    279x = 113,017.16
  5. Step 5: Solve for x
    x = 113,017.16/279
  6. Step 6: Final answer
    x = 405.08

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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.