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Finding the Fourth Proportional to 758.71, 1,047.22 and 443.96

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Solution

The fourth proportional to 758.71, 1,047.22 and 443.96 is: 612.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.71 : 1,047.22 = 443.96 : x
  2. Step 2: Convert to fraction form
    758.71/1,047.22 = 443.96/x
  3. Step 3: Cross multiply
    758.71x = 1,047.22 × 443.96
  4. Step 4: Simplify right side
    758.71x = 464,917.45
  5. Step 5: Solve for x
    x = 464,917.45/758.71
  6. Step 6: Final answer
    x = 612.78

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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.