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Finding the Fourth Proportional to 1,304.05, 1,956.21 and 1,211.17

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Solution

The fourth proportional to 1,304.05, 1,956.21 and 1,211.17 is: 1,816.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.05 : 1,956.21 = 1,211.17 : x
  2. Step 2: Convert to fraction form
    1,304.05/1,956.21 = 1,211.17/x
  3. Step 3: Cross multiply
    1,304.05x = 1,956.21 × 1,211.17
  4. Step 4: Simplify right side
    1,304.05x = 2,369,302.87
  5. Step 5: Solve for x
    x = 2,369,302.87/1,304.05
  6. Step 6: Final answer
    x = 1,816.88

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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.