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Finding the Fourth Proportional to 415,321,479.20, 622,982,218.80 and 415,321,479.20

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Solution

The fourth proportional to 415,321,479.20, 622,982,218.80 and 415,321,479.20 is: 622,982,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,321,479.20 : 622,982,218.80 = 415,321,479.20 : x
  2. Step 2: Convert to fraction form
    415,321,479.20/622,982,218.80 = 415,321,479.20/x
  3. Step 3: Cross multiply
    415,321,479.20x = 622,982,218.80 × 415,321,479.20
  4. Step 4: Simplify right side
    415,321,479.20x = 258,737,896,627,314,016
  5. Step 5: Solve for x
    x = 258,737,896,627,314,016/415,321,479.20
  6. Step 6: Final answer
    x = 622,982,218.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.