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Finding the Fourth Proportional to 803.68, 1,107.74 and 733.98

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Solution

The fourth proportional to 803.68, 1,107.74 and 733.98 is: 1,011.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.68 : 1,107.74 = 733.98 : x
  2. Step 2: Convert to fraction form
    803.68/1,107.74 = 733.98/x
  3. Step 3: Cross multiply
    803.68x = 1,107.74 × 733.98
  4. Step 4: Simplify right side
    803.68x = 813,059.01
  5. Step 5: Solve for x
    x = 813,059.01/803.68
  6. Step 6: Final answer
    x = 1,011.67

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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.