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Finding the Third Proportional to 390,462.75 and 603,390.75

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Solution

The third proportional to 390,462.75 and 603,390.75 is: 932,433.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,462.75 : 603,390.75 = 603,390.75 : x
  2. Step 2: Convert to fraction form
    390,462.75/603,390.75 = 603,390.75/x
  3. Step 3: Cross multiply
    390,462.75x = 603,390.75 × 603,390.75
  4. Step 4: Simplify right side
    390,462.75x = 364,080,397,185.56
  5. Step 5: Solve for x
    x = 364,080,397,185.56/390,462.75
  6. Step 6: Final answer
    x = 932,433.11

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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.