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Finding the Fourth Proportional to 275.63, 380.38 and 157.64

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Solution

The fourth proportional to 275.63, 380.38 and 157.64 is: 217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.63 : 380.38 = 157.64 : x
  2. Step 2: Convert to fraction form
    275.63/380.38 = 157.64/x
  3. Step 3: Cross multiply
    275.63x = 380.38 × 157.64
  4. Step 4: Simplify right side
    275.63x = 59,963.10
  5. Step 5: Solve for x
    x = 59,963.10/275.63
  6. Step 6: Final answer
    x = 217.55

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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.