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Finding the Fourth Proportional to 491.60, 737.91 and 217.88

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Solution

The fourth proportional to 491.60, 737.91 and 217.88 is: 327.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.60 : 737.91 = 217.88 : x
  2. Step 2: Convert to fraction form
    491.60/737.91 = 217.88/x
  3. Step 3: Cross multiply
    491.60x = 737.91 × 217.88
  4. Step 4: Simplify right side
    491.60x = 160,774.55
  5. Step 5: Solve for x
    x = 160,774.55/491.60
  6. Step 6: Final answer
    x = 327.05

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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.