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Finding the Fourth Proportional to 157.28, 216.78 and 146.48

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Solution

The fourth proportional to 157.28, 216.78 and 146.48 is: 201.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.28 : 216.78 = 146.48 : x
  2. Step 2: Convert to fraction form
    157.28/216.78 = 146.48/x
  3. Step 3: Cross multiply
    157.28x = 216.78 × 146.48
  4. Step 4: Simplify right side
    157.28x = 31,753.93
  5. Step 5: Solve for x
    x = 31,753.93/157.28
  6. Step 6: Final answer
    x = 201.89

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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.