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Finding the Fourth Proportional to 486,305.64, 729,494.10 and 131,311.80

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Solution

The fourth proportional to 486,305.64, 729,494.10 and 131,311.80 is: 196,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,305.64 : 729,494.10 = 131,311.80 : x
  2. Step 2: Convert to fraction form
    486,305.64/729,494.10 = 131,311.80/x
  3. Step 3: Cross multiply
    486,305.64x = 729,494.10 × 131,311.80
  4. Step 4: Simplify right side
    486,305.64x = 95,791,183,360.38
  5. Step 5: Solve for x
    x = 95,791,183,360.38/486,305.64
  6. Step 6: Final answer
    x = 196,977.32

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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.