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Finding the Fourth Proportional to 491.37, 736.74 and 328.74

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Solution

The fourth proportional to 491.37, 736.74 and 328.74 is: 492.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.37 : 736.74 = 328.74 : x
  2. Step 2: Convert to fraction form
    491.37/736.74 = 328.74/x
  3. Step 3: Cross multiply
    491.37x = 736.74 × 328.74
  4. Step 4: Simplify right side
    491.37x = 242,195.91
  5. Step 5: Solve for x
    x = 242,195.91/491.37
  6. Step 6: Final answer
    x = 492.90

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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.