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Finding the Fourth Proportional to 299,790.80, 449,628.60 and 89,435.60

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Solution

The fourth proportional to 299,790.80, 449,628.60 and 89,435.60 is: 134,136.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,790.80 : 449,628.60 = 89,435.60 : x
  2. Step 2: Convert to fraction form
    299,790.80/449,628.60 = 89,435.60/x
  3. Step 3: Cross multiply
    299,790.80x = 449,628.60 × 89,435.60
  4. Step 4: Simplify right side
    299,790.80x = 40,212,803,618.16
  5. Step 5: Solve for x
    x = 40,212,803,618.16/299,790.80
  6. Step 6: Final answer
    x = 134,136.22

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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.