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Finding the Fourth Proportional to 736.43, 1,015.92 and 425.75

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Solution

The fourth proportional to 736.43, 1,015.92 and 425.75 is: 587.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.43 : 1,015.92 = 425.75 : x
  2. Step 2: Convert to fraction form
    736.43/1,015.92 = 425.75/x
  3. Step 3: Cross multiply
    736.43x = 1,015.92 × 425.75
  4. Step 4: Simplify right side
    736.43x = 432,527.94
  5. Step 5: Solve for x
    x = 432,527.94/736.43
  6. Step 6: Final answer
    x = 587.33

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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.