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Finding the Fourth Proportional to 415,099.80, 622,649.70 and 247,138.20

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Solution

The fourth proportional to 415,099.80, 622,649.70 and 247,138.20 is: 370,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,099.80 : 622,649.70 = 247,138.20 : x
  2. Step 2: Convert to fraction form
    415,099.80/622,649.70 = 247,138.20/x
  3. Step 3: Cross multiply
    415,099.80x = 622,649.70 × 247,138.20
  4. Step 4: Simplify right side
    415,099.80x = 153,880,526,088.54
  5. Step 5: Solve for x
    x = 153,880,526,088.54/415,099.80
  6. Step 6: Final answer
    x = 370,707.30

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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.