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Finding the Fourth Proportional to 491.45, 736.45 and 247.64

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Solution

The fourth proportional to 491.45, 736.45 and 247.64 is: 371.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.45 : 736.45 = 247.64 : x
  2. Step 2: Convert to fraction form
    491.45/736.45 = 247.64/x
  3. Step 3: Cross multiply
    491.45x = 736.45 × 247.64
  4. Step 4: Simplify right side
    491.45x = 182,370.18
  5. Step 5: Solve for x
    x = 182,370.18/491.45
  6. Step 6: Final answer
    x = 371.09

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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.