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Finding the Third Proportional to 489,145.50 and 643,225.50

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Solution

The third proportional to 489,145.50 and 643,225.50 is: 845,840.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,145.50 : 643,225.50 = 643,225.50 : x
  2. Step 2: Convert to fraction form
    489,145.50/643,225.50 = 643,225.50/x
  3. Step 3: Cross multiply
    489,145.50x = 643,225.50 × 643,225.50
  4. Step 4: Simplify right side
    489,145.50x = 413,739,043,850.25
  5. Step 5: Solve for x
    x = 413,739,043,850.25/489,145.50
  6. Step 6: Final answer
    x = 845,840.44

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.