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Finding the Fourth Proportional to 415,204.40, 622,806.60 and 407,331.20

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Solution

The fourth proportional to 415,204.40, 622,806.60 and 407,331.20 is: 610,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,204.40 : 622,806.60 = 407,331.20 : x
  2. Step 2: Convert to fraction form
    415,204.40/622,806.60 = 407,331.20/x
  3. Step 3: Cross multiply
    415,204.40x = 622,806.60 × 407,331.20
  4. Step 4: Simplify right side
    415,204.40x = 253,688,559,745.92
  5. Step 5: Solve for x
    x = 253,688,559,745.92/415,204.40
  6. Step 6: Final answer
    x = 610,996.80

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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.