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Finding the Third Proportional to 921,420 and 1,395,022.50

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Solution

The third proportional to 921,420 and 1,395,022.50 is: 2,112,052.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,420 : 1,395,022.50 = 1,395,022.50 : x
  2. Step 2: Convert to fraction form
    921,420/1,395,022.50 = 1,395,022.50/x
  3. Step 3: Cross multiply
    921,420x = 1,395,022.50 × 1,395,022.50
  4. Step 4: Simplify right side
    921,420x = 1,946,087,775,506.25
  5. Step 5: Solve for x
    x = 1,946,087,775,506.25/921,420
  6. Step 6: Final answer
    x = 2,112,052.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.