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Finding the Fourth Proportional to 208.94, 313.47 and 100.73

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Solution

The fourth proportional to 208.94, 313.47 and 100.73 is: 151.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.94 : 313.47 = 100.73 : x
  2. Step 2: Convert to fraction form
    208.94/313.47 = 100.73/x
  3. Step 3: Cross multiply
    208.94x = 313.47 × 100.73
  4. Step 4: Simplify right side
    208.94x = 31,575.83
  5. Step 5: Solve for x
    x = 31,575.83/208.94
  6. Step 6: Final answer
    x = 151.12

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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.