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Finding the Fourth Proportional to 253.91, 380.90 and 116.99

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Solution

The fourth proportional to 253.91, 380.90 and 116.99 is: 175.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.91 : 380.90 = 116.99 : x
  2. Step 2: Convert to fraction form
    253.91/380.90 = 116.99/x
  3. Step 3: Cross multiply
    253.91x = 380.90 × 116.99
  4. Step 4: Simplify right side
    253.91x = 44,561.31
  5. Step 5: Solve for x
    x = 44,561.31/253.91
  6. Step 6: Final answer
    x = 175.50

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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.