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Finding the Fourth Proportional to 272.96, 377.16 and 215.18

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Solution

The fourth proportional to 272.96, 377.16 and 215.18 is: 297.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.96 : 377.16 = 215.18 : x
  2. Step 2: Convert to fraction form
    272.96/377.16 = 215.18/x
  3. Step 3: Cross multiply
    272.96x = 377.16 × 215.18
  4. Step 4: Simplify right side
    272.96x = 81,157.29
  5. Step 5: Solve for x
    x = 81,157.29/272.96
  6. Step 6: Final answer
    x = 297.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.