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Finding the Fourth Proportional to 253.37, 380.03 and 99.28

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Solution

The fourth proportional to 253.37, 380.03 and 99.28 is: 148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.37 : 380.03 = 99.28 : x
  2. Step 2: Convert to fraction form
    253.37/380.03 = 99.28/x
  3. Step 3: Cross multiply
    253.37x = 380.03 × 99.28
  4. Step 4: Simplify right side
    253.37x = 37,729.38
  5. Step 5: Solve for x
    x = 37,729.38/253.37
  6. Step 6: Final answer
    x = 148.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.