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Finding the Fourth Proportional to 499.88, 755.48 and 491.36

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Solution

The fourth proportional to 499.88, 755.48 and 491.36 is: 742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.88 : 755.48 = 491.36 : x
  2. Step 2: Convert to fraction form
    499.88/755.48 = 491.36/x
  3. Step 3: Cross multiply
    499.88x = 755.48 × 491.36
  4. Step 4: Simplify right side
    499.88x = 371,212.65
  5. Step 5: Solve for x
    x = 371,212.65/499.88
  6. Step 6: Final answer
    x = 742.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.