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Finding the Fourth Proportional to 844.56, 1,265.94 and 638.82

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Solution

The fourth proportional to 844.56, 1,265.94 and 638.82 is: 957.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.56 : 1,265.94 = 638.82 : x
  2. Step 2: Convert to fraction form
    844.56/1,265.94 = 638.82/x
  3. Step 3: Cross multiply
    844.56x = 1,265.94 × 638.82
  4. Step 4: Simplify right side
    844.56x = 808,707.79
  5. Step 5: Solve for x
    x = 808,707.79/844.56
  6. Step 6: Final answer
    x = 957.55

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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.