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Finding the Fourth Proportional to 208.48, 313.89 and 154.82

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Solution

The fourth proportional to 208.48, 313.89 and 154.82 is: 233.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.48 : 313.89 = 154.82 : x
  2. Step 2: Convert to fraction form
    208.48/313.89 = 154.82/x
  3. Step 3: Cross multiply
    208.48x = 313.89 × 154.82
  4. Step 4: Simplify right side
    208.48x = 48,596.45
  5. Step 5: Solve for x
    x = 48,596.45/208.48
  6. Step 6: Final answer
    x = 233.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.