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Finding the Third Proportional to 421,915.50 and 909,805.50

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Solution

The third proportional to 421,915.50 and 909,805.50 is: 1,961,876.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,915.50 : 909,805.50 = 909,805.50 : x
  2. Step 2: Convert to fraction form
    421,915.50/909,805.50 = 909,805.50/x
  3. Step 3: Cross multiply
    421,915.50x = 909,805.50 × 909,805.50
  4. Step 4: Simplify right side
    421,915.50x = 827,746,047,830.25
  5. Step 5: Solve for x
    x = 827,746,047,830.25/421,915.50
  6. Step 6: Final answer
    x = 1,961,876.37

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.