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Finding the Fourth Proportional to 381.04, 570.89 and 289.46

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Solution

The fourth proportional to 381.04, 570.89 and 289.46 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.04 : 570.89 = 289.46 : x
  2. Step 2: Convert to fraction form
    381.04/570.89 = 289.46/x
  3. Step 3: Cross multiply
    381.04x = 570.89 × 289.46
  4. Step 4: Simplify right side
    381.04x = 165,251.97
  5. Step 5: Solve for x
    x = 165,251.97/381.04
  6. Step 6: Final answer
    x = 433.69

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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.