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Finding the Third Proportional to 631,078 and 1,388,365

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Solution

The third proportional to 631,078 and 1,388,365 is: 3,054,388.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,078 : 1,388,365 = 1,388,365 : x
  2. Step 2: Convert to fraction form
    631,078/1,388,365 = 1,388,365/x
  3. Step 3: Cross multiply
    631,078x = 1,388,365 × 1,388,365
  4. Step 4: Simplify right side
    631,078x = 1,927,557,373,225
  5. Step 5: Solve for x
    x = 1,927,557,373,225/631,078
  6. Step 6: Final answer
    x = 3,054,388.48

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.