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Finding the Fourth Proportional to 618,129.72, 925,991.64 and 455,727.96

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Solution

The fourth proportional to 618,129.72, 925,991.64 and 455,727.96 is: 682,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,129.72 : 925,991.64 = 455,727.96 : x
  2. Step 2: Convert to fraction form
    618,129.72/925,991.64 = 455,727.96/x
  3. Step 3: Cross multiply
    618,129.72x = 925,991.64 × 455,727.96
  4. Step 4: Simplify right side
    618,129.72x = 422,000,281,074.25
  5. Step 5: Solve for x
    x = 422,000,281,074.25/618,129.72
  6. Step 6: Final answer
    x = 682,705.05

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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.