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Finding the Fourth Proportional to 700.43, 1,049.78 and 289.44

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Solution

The fourth proportional to 700.43, 1,049.78 and 289.44 is: 433.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.43 : 1,049.78 = 289.44 : x
  2. Step 2: Convert to fraction form
    700.43/1,049.78 = 289.44/x
  3. Step 3: Cross multiply
    700.43x = 1,049.78 × 289.44
  4. Step 4: Simplify right side
    700.43x = 303,849.05
  5. Step 5: Solve for x
    x = 303,849.05/700.43
  6. Step 6: Final answer
    x = 433.81

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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.