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Finding the Fourth Proportional to 272.39, 375.81 and 155.94

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Solution

The fourth proportional to 272.39, 375.81 and 155.94 is: 215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.39 : 375.81 = 155.94 : x
  2. Step 2: Convert to fraction form
    272.39/375.81 = 155.94/x
  3. Step 3: Cross multiply
    272.39x = 375.81 × 155.94
  4. Step 4: Simplify right side
    272.39x = 58,603.81
  5. Step 5: Solve for x
    x = 58,603.81/272.39
  6. Step 6: Final answer
    x = 215.15

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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.