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Finding the Fourth Proportional to 444,589.40, 666,949.70 and 129,005.28

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Solution

The fourth proportional to 444,589.40, 666,949.70 and 129,005.28 is: 193,526.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,589.40 : 666,949.70 = 129,005.28 : x
  2. Step 2: Convert to fraction form
    444,589.40/666,949.70 = 129,005.28/x
  3. Step 3: Cross multiply
    444,589.40x = 666,949.70 × 129,005.28
  4. Step 4: Simplify right side
    444,589.40x = 86,040,032,794.42
  5. Step 5: Solve for x
    x = 86,040,032,794.42/444,589.40
  6. Step 6: Final answer
    x = 193,526.95

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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.