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Finding the Fourth Proportional to 418,712.60, 628,069.20 and 103,169.51

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Solution

The fourth proportional to 418,712.60, 628,069.20 and 103,169.51 is: 154,754.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,712.60 : 628,069.20 = 103,169.51 : x
  2. Step 2: Convert to fraction form
    418,712.60/628,069.20 = 103,169.51/x
  3. Step 3: Cross multiply
    418,712.60x = 628,069.20 × 103,169.51
  4. Step 4: Simplify right side
    418,712.60x = 64,797,588,469.75
  5. Step 5: Solve for x
    x = 64,797,588,469.75/418,712.60
  6. Step 6: Final answer
    x = 154,754.33

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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.