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Finding the Third Proportional to 320,611.50 and 500,326.88

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Solution

The third proportional to 320,611.50 and 500,326.88 is: 780,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,611.50 : 500,326.88 = 500,326.88 : x
  2. Step 2: Convert to fraction form
    320,611.50/500,326.88 = 500,326.88/x
  3. Step 3: Cross multiply
    320,611.50x = 500,326.88 × 500,326.88
  4. Step 4: Simplify right side
    320,611.50x = 250,326,981,847.27
  5. Step 5: Solve for x
    x = 250,326,981,847.27/320,611.50
  6. Step 6: Final answer
    x = 780,779.80

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.