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Finding the Fourth Proportional to 418,988.64, 628,488.82 and 119,469.34

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Solution

The fourth proportional to 418,988.64, 628,488.82 and 119,469.34 is: 179,205.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,988.64 : 628,488.82 = 119,469.34 : x
  2. Step 2: Convert to fraction form
    418,988.64/628,488.82 = 119,469.34/x
  3. Step 3: Cross multiply
    418,988.64x = 628,488.82 × 119,469.34
  4. Step 4: Simplify right side
    418,988.64x = 75,085,145,457.73
  5. Step 5: Solve for x
    x = 75,085,145,457.73/418,988.64
  6. Step 6: Final answer
    x = 179,205.68

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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.