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Finding the Third Proportional to 415,620 and 909,000

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Solution

The third proportional to 415,620 and 909,000 is: 1,988,068.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,620 : 909,000 = 909,000 : x
  2. Step 2: Convert to fraction form
    415,620/909,000 = 909,000/x
  3. Step 3: Cross multiply
    415,620x = 909,000 × 909,000
  4. Step 4: Simplify right side
    415,620x = 826,281,000,000
  5. Step 5: Solve for x
    x = 826,281,000,000/415,620
  6. Step 6: Final answer
    x = 1,988,068.43

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.