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Finding the Fourth Proportional to 299,911.20, 449,917.20 and 89,570.40

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Solution

The fourth proportional to 299,911.20, 449,917.20 and 89,570.40 is: 134,370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,911.20 : 449,917.20 = 89,570.40 : x
  2. Step 2: Convert to fraction form
    299,911.20/449,917.20 = 89,570.40/x
  3. Step 3: Cross multiply
    299,911.20x = 449,917.20 × 89,570.40
  4. Step 4: Simplify right side
    299,911.20x = 40,299,263,570.88
  5. Step 5: Solve for x
    x = 40,299,263,570.88/299,911.20
  6. Step 6: Final answer
    x = 134,370.65

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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.