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Finding the Fourth Proportional to 303,766.40, 455,649.60 and 126,619.40

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Solution

The fourth proportional to 303,766.40, 455,649.60 and 126,619.40 is: 189,929.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,766.40 : 455,649.60 = 126,619.40 : x
  2. Step 2: Convert to fraction form
    303,766.40/455,649.60 = 126,619.40/x
  3. Step 3: Cross multiply
    303,766.40x = 455,649.60 × 126,619.40
  4. Step 4: Simplify right side
    303,766.40x = 57,694,078,962.24
  5. Step 5: Solve for x
    x = 57,694,078,962.24/303,766.40
  6. Step 6: Final answer
    x = 189,929.10

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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.