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Finding the Fourth Proportional to 369.06, 553.56 and 143.68

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Solution

The fourth proportional to 369.06, 553.56 and 143.68 is: 215.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.06 : 553.56 = 143.68 : x
  2. Step 2: Convert to fraction form
    369.06/553.56 = 143.68/x
  3. Step 3: Cross multiply
    369.06x = 553.56 × 143.68
  4. Step 4: Simplify right side
    369.06x = 79,532.73
  5. Step 5: Solve for x
    x = 79,532.73/369.06
  6. Step 6: Final answer
    x = 215.50

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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.