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Finding the Fourth Proportional to 491.97, 738.38 and 261.02

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Solution

The fourth proportional to 491.97, 738.38 and 261.02 is: 391.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.97 : 738.38 = 261.02 : x
  2. Step 2: Convert to fraction form
    491.97/738.38 = 261.02/x
  3. Step 3: Cross multiply
    491.97x = 738.38 × 261.02
  4. Step 4: Simplify right side
    491.97x = 192,730.64
  5. Step 5: Solve for x
    x = 192,730.64/491.97
  6. Step 6: Final answer
    x = 391.75

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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.