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Finding the Fourth Proportional to 666,081.19, 998,971.06 and 305,905.78

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Solution

The fourth proportional to 666,081.19, 998,971.06 and 305,905.78 is: 458,789.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,081.19 : 998,971.06 = 305,905.78 : x
  2. Step 2: Convert to fraction form
    666,081.19/998,971.06 = 305,905.78/x
  3. Step 3: Cross multiply
    666,081.19x = 998,971.06 × 305,905.78
  4. Step 4: Simplify right side
    666,081.19x = 305,591,021,306.73
  5. Step 5: Solve for x
    x = 305,591,021,306.73/666,081.19
  6. Step 6: Final answer
    x = 458,789.45

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1.5x scale

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.