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Finding the Fourth Proportional to 1,305.70, 1,956.72 and 758.02

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Solution

The fourth proportional to 1,305.70, 1,956.72 and 758.02 is: 1,135.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.70 : 1,956.72 = 758.02 : x
  2. Step 2: Convert to fraction form
    1,305.70/1,956.72 = 758.02/x
  3. Step 3: Cross multiply
    1,305.70x = 1,956.72 × 758.02
  4. Step 4: Simplify right side
    1,305.70x = 1,483,232.89
  5. Step 5: Solve for x
    x = 1,483,232.89/1,305.70
  6. Step 6: Final answer
    x = 1,135.97

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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.