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Finding the Fourth Proportional to 739.54, 1,107.81 and 446.87

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Solution

The fourth proportional to 739.54, 1,107.81 and 446.87 is: 669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.54 : 1,107.81 = 446.87 : x
  2. Step 2: Convert to fraction form
    739.54/1,107.81 = 446.87/x
  3. Step 3: Cross multiply
    739.54x = 1,107.81 × 446.87
  4. Step 4: Simplify right side
    739.54x = 495,047.05
  5. Step 5: Solve for x
    x = 495,047.05/739.54
  6. Step 6: Final answer
    x = 669.40

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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.