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Finding the Fourth Proportional to 338.73, 508.12 and 143.77

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Solution

The fourth proportional to 338.73, 508.12 and 143.77 is: 215.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.73 : 508.12 = 143.77 : x
  2. Step 2: Convert to fraction form
    338.73/508.12 = 143.77/x
  3. Step 3: Cross multiply
    338.73x = 508.12 × 143.77
  4. Step 4: Simplify right side
    338.73x = 73,051.69
  5. Step 5: Solve for x
    x = 73,051.69/338.73
  6. Step 6: Final answer
    x = 215.67

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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.