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Finding the Fourth Proportional to 272.45, 375.93 and 156.05

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Solution

The fourth proportional to 272.45, 375.93 and 156.05 is: 215.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.45 : 375.93 = 156.05 : x
  2. Step 2: Convert to fraction form
    272.45/375.93 = 156.05/x
  3. Step 3: Cross multiply
    272.45x = 375.93 × 156.05
  4. Step 4: Simplify right side
    272.45x = 58,663.10
  5. Step 5: Solve for x
    x = 58,663.10/272.45
  6. Step 6: Final answer
    x = 215.32

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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.