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Finding the Fourth Proportional to 496.88, 685.98 and 380.66

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Solution

The fourth proportional to 496.88, 685.98 and 380.66 is: 525.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.88 : 685.98 = 380.66 : x
  2. Step 2: Convert to fraction form
    496.88/685.98 = 380.66/x
  3. Step 3: Cross multiply
    496.88x = 685.98 × 380.66
  4. Step 4: Simplify right side
    496.88x = 261,119.81
  5. Step 5: Solve for x
    x = 261,119.81/496.88
  6. Step 6: Final answer
    x = 525.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.