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Finding the Fourth Proportional to 465,811.20, 698,716.80 and 415,072.80

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Solution

The fourth proportional to 465,811.20, 698,716.80 and 415,072.80 is: 622,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,811.20 : 698,716.80 = 415,072.80 : x
  2. Step 2: Convert to fraction form
    465,811.20/698,716.80 = 415,072.80/x
  3. Step 3: Cross multiply
    465,811.20x = 698,716.80 × 415,072.80
  4. Step 4: Simplify right side
    465,811.20x = 290,018,338,583.04
  5. Step 5: Solve for x
    x = 290,018,338,583.04/465,811.20
  6. Step 6: Final answer
    x = 622,609.20

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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.