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Finding the Third Proportional to 401,553 and 645,745.50

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Solution

The third proportional to 401,553 and 645,745.50 is: 1,038,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,553 : 645,745.50 = 645,745.50 : x
  2. Step 2: Convert to fraction form
    401,553/645,745.50 = 645,745.50/x
  3. Step 3: Cross multiply
    401,553x = 645,745.50 × 645,745.50
  4. Step 4: Simplify right side
    401,553x = 416,987,250,770.25
  5. Step 5: Solve for x
    x = 416,987,250,770.25/401,553
  6. Step 6: Final answer
    x = 1,038,436.40

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.