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Finding the Fourth Proportional to 496.11, 685.31 and 387.02

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Solution

The fourth proportional to 496.11, 685.31 and 387.02 is: 534.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.11 : 685.31 = 387.02 : x
  2. Step 2: Convert to fraction form
    496.11/685.31 = 387.02/x
  3. Step 3: Cross multiply
    496.11x = 685.31 × 387.02
  4. Step 4: Simplify right side
    496.11x = 265,223.31
  5. Step 5: Solve for x
    x = 265,223.31/496.11
  6. Step 6: Final answer
    x = 534.61

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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.