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Finding the Fourth Proportional to 1,956.76, 2,935.54 and 861.03

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Solution

The fourth proportional to 1,956.76, 2,935.54 and 861.03 is: 1,291.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.76 : 2,935.54 = 861.03 : x
  2. Step 2: Convert to fraction form
    1,956.76/2,935.54 = 861.03/x
  3. Step 3: Cross multiply
    1,956.76x = 2,935.54 × 861.03
  4. Step 4: Simplify right side
    1,956.76x = 2,527,589.08
  5. Step 5: Solve for x
    x = 2,527,589.08/1,956.76
  6. Step 6: Final answer
    x = 1,291.72

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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.