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Finding the Fourth Proportional to 417,353.88, 626,205.78 and 136,899.48

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Solution

The fourth proportional to 417,353.88, 626,205.78 and 136,899.48 is: 205,406.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,353.88 : 626,205.78 = 136,899.48 : x
  2. Step 2: Convert to fraction form
    417,353.88/626,205.78 = 136,899.48/x
  3. Step 3: Cross multiply
    417,353.88x = 626,205.78 × 136,899.48
  4. Step 4: Simplify right side
    417,353.88x = 85,727,245,654.99
  5. Step 5: Solve for x
    x = 85,727,245,654.99/417,353.88
  6. Step 6: Final answer
    x = 205,406.61

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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.