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Finding the Fourth Proportional to 662.19, 991.46 and 499.38

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Solution

The fourth proportional to 662.19, 991.46 and 499.38 is: 747.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.19 : 991.46 = 499.38 : x
  2. Step 2: Convert to fraction form
    662.19/991.46 = 499.38/x
  3. Step 3: Cross multiply
    662.19x = 991.46 × 499.38
  4. Step 4: Simplify right side
    662.19x = 495,112.80
  5. Step 5: Solve for x
    x = 495,112.80/662.19
  6. Step 6: Final answer
    x = 747.69

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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.