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Finding the Fourth Proportional to 253.24, 380.04 and 90.94

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Solution

The fourth proportional to 253.24, 380.04 and 90.94 is: 136.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.24 : 380.04 = 90.94 : x
  2. Step 2: Convert to fraction form
    253.24/380.04 = 90.94/x
  3. Step 3: Cross multiply
    253.24x = 380.04 × 90.94
  4. Step 4: Simplify right side
    253.24x = 34,560.84
  5. Step 5: Solve for x
    x = 34,560.84/253.24
  6. Step 6: Final answer
    x = 136.47

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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.