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Finding the Fourth Proportional to 496.15, 743.51 and 287.57

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Solution

The fourth proportional to 496.15, 743.51 and 287.57 is: 430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.15 : 743.51 = 287.57 : x
  2. Step 2: Convert to fraction form
    496.15/743.51 = 287.57/x
  3. Step 3: Cross multiply
    496.15x = 743.51 × 287.57
  4. Step 4: Simplify right side
    496.15x = 213,813.75
  5. Step 5: Solve for x
    x = 213,813.75/496.15
  6. Step 6: Final answer
    x = 430.95

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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.