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Finding the Fourth Proportional to 491.77, 737.75 and 217.90

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Solution

The fourth proportional to 491.77, 737.75 and 217.90 is: 326.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.77 : 737.75 = 217.90 : x
  2. Step 2: Convert to fraction form
    491.77/737.75 = 217.90/x
  3. Step 3: Cross multiply
    491.77x = 737.75 × 217.90
  4. Step 4: Simplify right side
    491.77x = 160,755.73
  5. Step 5: Solve for x
    x = 160,755.73/491.77
  6. Step 6: Final answer
    x = 326.89

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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.