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Finding the Fourth Proportional to 5,305.45, 7,958.17 and 1,409.86

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Solution

The fourth proportional to 5,305.45, 7,958.17 and 1,409.86 is: 2,114.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,305.45 : 7,958.17 = 1,409.86 : x
  2. Step 2: Convert to fraction form
    5,305.45/7,958.17 = 1,409.86/x
  3. Step 3: Cross multiply
    5,305.45x = 7,958.17 × 1,409.86
  4. Step 4: Simplify right side
    5,305.45x = 11,219,864.57
  5. Step 5: Solve for x
    x = 11,219,864.57/5,305.45
  6. Step 6: Final answer
    x = 2,114.78

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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.