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Finding the Third Proportional to 314,352 and 643,228

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Solution

The third proportional to 314,352 and 643,228 is: 1,316,175.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,352 : 643,228 = 643,228 : x
  2. Step 2: Convert to fraction form
    314,352/643,228 = 643,228/x
  3. Step 3: Cross multiply
    314,352x = 643,228 × 643,228
  4. Step 4: Simplify right side
    314,352x = 413,742,259,984
  5. Step 5: Solve for x
    x = 413,742,259,984/314,352
  6. Step 6: Final answer
    x = 1,316,175.05

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.