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Finding the Fourth Proportional to 1,956.79, 2,934.45 and 982.21

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Solution

The fourth proportional to 1,956.79, 2,934.45 and 982.21 is: 1,472.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.79 : 2,934.45 = 982.21 : x
  2. Step 2: Convert to fraction form
    1,956.79/2,934.45 = 982.21/x
  3. Step 3: Cross multiply
    1,956.79x = 2,934.45 × 982.21
  4. Step 4: Simplify right side
    1,956.79x = 2,882,246.13
  5. Step 5: Solve for x
    x = 2,882,246.13/1,956.79
  6. Step 6: Final answer
    x = 1,472.95

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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.