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Finding the Third Proportional to 420,240 and 630,788

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Solution

The third proportional to 420,240 and 630,788 is: 946,824.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,240 : 630,788 = 630,788 : x
  2. Step 2: Convert to fraction form
    420,240/630,788 = 630,788/x
  3. Step 3: Cross multiply
    420,240x = 630,788 × 630,788
  4. Step 4: Simplify right side
    420,240x = 397,893,500,944
  5. Step 5: Solve for x
    x = 397,893,500,944/420,240
  6. Step 6: Final answer
    x = 946,824.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.