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Finding the Fourth Proportional to 733.56, 1,011.96 and 438.72

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Solution

The fourth proportional to 733.56, 1,011.96 and 438.72 is: 605.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.56 : 1,011.96 = 438.72 : x
  2. Step 2: Convert to fraction form
    733.56/1,011.96 = 438.72/x
  3. Step 3: Cross multiply
    733.56x = 1,011.96 × 438.72
  4. Step 4: Simplify right side
    733.56x = 443,967.09
  5. Step 5: Solve for x
    x = 443,967.09/733.56
  6. Step 6: Final answer
    x = 605.22

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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.