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Finding the Fourth Proportional to 253.50, 380.13 and 99.37

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Solution

The fourth proportional to 253.50, 380.13 and 99.37 is: 149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.50 : 380.13 = 99.37 : x
  2. Step 2: Convert to fraction form
    253.50/380.13 = 99.37/x
  3. Step 3: Cross multiply
    253.50x = 380.13 × 99.37
  4. Step 4: Simplify right side
    253.50x = 37,773.52
  5. Step 5: Solve for x
    x = 37,773.52/253.50
  6. Step 6: Final answer
    x = 149.01

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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.