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Finding the Fourth Proportional to 733.20, 1,011.72 and 438.36

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Solution

The fourth proportional to 733.20, 1,011.72 and 438.36 is: 604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.20 : 1,011.72 = 438.36 : x
  2. Step 2: Convert to fraction form
    733.20/1,011.72 = 438.36/x
  3. Step 3: Cross multiply
    733.20x = 1,011.72 × 438.36
  4. Step 4: Simplify right side
    733.20x = 443,497.58
  5. Step 5: Solve for x
    x = 443,497.58/733.20
  6. Step 6: Final answer
    x = 604.88

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1.5x scale

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.