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Finding the Fourth Proportional to 253.99, 350.50 and 137.55

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Solution

The fourth proportional to 253.99, 350.50 and 137.55 is: 189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.99 : 350.50 = 137.55 : x
  2. Step 2: Convert to fraction form
    253.99/350.50 = 137.55/x
  3. Step 3: Cross multiply
    253.99x = 350.50 × 137.55
  4. Step 4: Simplify right side
    253.99x = 48,210.40
  5. Step 5: Solve for x
    x = 48,210.40/253.99
  6. Step 6: Final answer
    x = 189.82

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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.