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Finding the Fourth Proportional to 299,990.70, 449,986.05 and 122,406.30

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Solution

The fourth proportional to 299,990.70, 449,986.05 and 122,406.30 is: 183,609.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,990.70 : 449,986.05 = 122,406.30 : x
  2. Step 2: Convert to fraction form
    299,990.70/449,986.05 = 122,406.30/x
  3. Step 3: Cross multiply
    299,990.70x = 449,986.05 × 122,406.30
  4. Step 4: Simplify right side
    299,990.70x = 55,081,127,432.12
  5. Step 5: Solve for x
    x = 55,081,127,432.12/299,990.70
  6. Step 6: Final answer
    x = 183,609.45

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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.