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Finding the Fourth Proportional to 299,991.70, 449,987.55 and 122,407.30

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Solution

The fourth proportional to 299,991.70, 449,987.55 and 122,407.30 is: 183,610.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,991.70 : 449,987.55 = 122,407.30 : x
  2. Step 2: Convert to fraction form
    299,991.70/449,987.55 = 122,407.30/x
  3. Step 3: Cross multiply
    299,991.70x = 449,987.55 × 122,407.30
  4. Step 4: Simplify right side
    299,991.70x = 55,081,761,029.12
  5. Step 5: Solve for x
    x = 55,081,761,029.12/299,991.70
  6. Step 6: Final answer
    x = 183,610.95

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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.