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Finding the Fourth Proportional to 365.71, 548.49 and 143.32

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Solution

The fourth proportional to 365.71, 548.49 and 143.32 is: 214.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.71 : 548.49 = 143.32 : x
  2. Step 2: Convert to fraction form
    365.71/548.49 = 143.32/x
  3. Step 3: Cross multiply
    365.71x = 548.49 × 143.32
  4. Step 4: Simplify right side
    365.71x = 78,609.59
  5. Step 5: Solve for x
    x = 78,609.59/365.71
  6. Step 6: Final answer
    x = 214.95

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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.