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Finding the Fourth Proportional to 369.19, 553.88 and 125.79

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Solution

The fourth proportional to 369.19, 553.88 and 125.79 is: 188.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.19 : 553.88 = 125.79 : x
  2. Step 2: Convert to fraction form
    369.19/553.88 = 125.79/x
  3. Step 3: Cross multiply
    369.19x = 553.88 × 125.79
  4. Step 4: Simplify right side
    369.19x = 69,672.57
  5. Step 5: Solve for x
    x = 69,672.57/369.19
  6. Step 6: Final answer
    x = 188.72

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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.