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Finding the Fourth Proportional to 1,306.04, 1,958.80 and 381.36

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Solution

The fourth proportional to 1,306.04, 1,958.80 and 381.36 is: 571.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.04 : 1,958.80 = 381.36 : x
  2. Step 2: Convert to fraction form
    1,306.04/1,958.80 = 381.36/x
  3. Step 3: Cross multiply
    1,306.04x = 1,958.80 × 381.36
  4. Step 4: Simplify right side
    1,306.04x = 747,007.97
  5. Step 5: Solve for x
    x = 747,007.97/1,306.04
  6. Step 6: Final answer
    x = 571.96

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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.