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Finding the Fourth Proportional to 369.28, 554.06 and 125.80

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Solution

The fourth proportional to 369.28, 554.06 and 125.80 is: 188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.28 : 554.06 = 125.80 : x
  2. Step 2: Convert to fraction form
    369.28/554.06 = 125.80/x
  3. Step 3: Cross multiply
    369.28x = 554.06 × 125.80
  4. Step 4: Simplify right side
    369.28x = 69,700.75
  5. Step 5: Solve for x
    x = 69,700.75/369.28
  6. Step 6: Final answer
    x = 188.75

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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.