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Finding the Fourth Proportional to 418,958.73, 628,429.59 and 103,418.37

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Solution

The fourth proportional to 418,958.73, 628,429.59 and 103,418.37 is: 155,125.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,958.73 : 628,429.59 = 103,418.37 : x
  2. Step 2: Convert to fraction form
    418,958.73/628,429.59 = 103,418.37/x
  3. Step 3: Cross multiply
    418,958.73x = 628,429.59 × 103,418.37
  4. Step 4: Simplify right side
    418,958.73x = 64,991,163,857.57
  5. Step 5: Solve for x
    x = 64,991,163,857.57/418,958.73
  6. Step 6: Final answer
    x = 155,125.46

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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.