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Finding the Third Proportional to 405,717 and 630,700

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Solution

The third proportional to 405,717 and 630,700 is: 980,443.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,717 : 630,700 = 630,700 : x
  2. Step 2: Convert to fraction form
    405,717/630,700 = 630,700/x
  3. Step 3: Cross multiply
    405,717x = 630,700 × 630,700
  4. Step 4: Simplify right side
    405,717x = 397,782,490,000
  5. Step 5: Solve for x
    x = 397,782,490,000/405,717
  6. Step 6: Final answer
    x = 980,443.24

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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.