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Finding the Fourth Proportional to 1,304.34, 1,956.81 and 379.91

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Solution

The fourth proportional to 1,304.34, 1,956.81 and 379.91 is: 569.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.34 : 1,956.81 = 379.91 : x
  2. Step 2: Convert to fraction form
    1,304.34/1,956.81 = 379.91/x
  3. Step 3: Cross multiply
    1,304.34x = 1,956.81 × 379.91
  4. Step 4: Simplify right side
    1,304.34x = 743,401.90
  5. Step 5: Solve for x
    x = 743,401.90/1,304.34
  6. Step 6: Final answer
    x = 569.94

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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.