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Finding the Third Proportional to 390,379.50 and 577,914.75

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Solution

The third proportional to 390,379.50 and 577,914.75 is: 855,540.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,379.50 : 577,914.75 = 577,914.75 : x
  2. Step 2: Convert to fraction form
    390,379.50/577,914.75 = 577,914.75/x
  3. Step 3: Cross multiply
    390,379.50x = 577,914.75 × 577,914.75
  4. Step 4: Simplify right side
    390,379.50x = 333,985,458,267.56
  5. Step 5: Solve for x
    x = 333,985,458,267.56/390,379.50
  6. Step 6: Final answer
    x = 855,540.46

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.