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Finding the Fourth Proportional to 415,353.20, 622,108.20 and 165,906.80

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Solution

The fourth proportional to 415,353.20, 622,108.20 and 165,906.80 is: 248,492.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,353.20 : 622,108.20 = 165,906.80 : x
  2. Step 2: Convert to fraction form
    415,353.20/622,108.20 = 165,906.80/x
  3. Step 3: Cross multiply
    415,353.20x = 622,108.20 × 165,906.80
  4. Step 4: Simplify right side
    415,353.20x = 103,211,980,715.76
  5. Step 5: Solve for x
    x = 103,211,980,715.76/415,353.20
  6. Step 6: Final answer
    x = 248,492.08

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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.