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Finding the Fourth Proportional to 737.94, 1,107.21 and 305.40

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Solution

The fourth proportional to 737.94, 1,107.21 and 305.40 is: 458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.94 : 1,107.21 = 305.40 : x
  2. Step 2: Convert to fraction form
    737.94/1,107.21 = 305.40/x
  3. Step 3: Cross multiply
    737.94x = 1,107.21 × 305.40
  4. Step 4: Simplify right side
    737.94x = 338,141.93
  5. Step 5: Solve for x
    x = 338,141.93/737.94
  6. Step 6: Final answer
    x = 458.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.