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Finding the Fourth Proportional to 275.64, 380.32 and 157.60

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Solution

The fourth proportional to 275.64, 380.32 and 157.60 is: 217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.64 : 380.32 = 157.60 : x
  2. Step 2: Convert to fraction form
    275.64/380.32 = 157.60/x
  3. Step 3: Cross multiply
    275.64x = 380.32 × 157.60
  4. Step 4: Simplify right side
    275.64x = 59,938.43
  5. Step 5: Solve for x
    x = 59,938.43/275.64
  6. Step 6: Final answer
    x = 217.45

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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.