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Finding the Third Proportional to 390,501.75 and 603,449.25

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Solution

The third proportional to 390,501.75 and 603,449.25 is: 932,520.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,501.75 : 603,449.25 = 603,449.25 : x
  2. Step 2: Convert to fraction form
    390,501.75/603,449.25 = 603,449.25/x
  3. Step 3: Cross multiply
    390,501.75x = 603,449.25 × 603,449.25
  4. Step 4: Simplify right side
    390,501.75x = 364,150,997,325.56
  5. Step 5: Solve for x
    x = 364,150,997,325.56/390,501.75
  6. Step 6: Final answer
    x = 932,520.78

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.