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Finding the Fourth Proportional to 733.39, 1,011.98 and 438.55

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Solution

The fourth proportional to 733.39, 1,011.98 and 438.55 is: 605.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.39 : 1,011.98 = 438.55 : x
  2. Step 2: Convert to fraction form
    733.39/1,011.98 = 438.55/x
  3. Step 3: Cross multiply
    733.39x = 1,011.98 × 438.55
  4. Step 4: Simplify right side
    733.39x = 443,800.75
  5. Step 5: Solve for x
    x = 443,800.75/733.39
  6. Step 6: Final answer
    x = 605.14

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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.