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Finding the Fourth Proportional to 415,997.86, 623,998.60 and 131,689.80

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Solution

The fourth proportional to 415,997.86, 623,998.60 and 131,689.80 is: 197,535.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,997.86 : 623,998.60 = 131,689.80 : x
  2. Step 2: Convert to fraction form
    415,997.86/623,998.60 = 131,689.80/x
  3. Step 3: Cross multiply
    415,997.86x = 623,998.60 × 131,689.80
  4. Step 4: Simplify right side
    415,997.86x = 82,174,251,245.81
  5. Step 5: Solve for x
    x = 82,174,251,245.81/415,997.86
  6. Step 6: Final answer
    x = 197,535.27

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1.5x scale

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.