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Finding the Fourth Proportional to 393,460.40, 590,336.40 and 127,229.60

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Solution

The fourth proportional to 393,460.40, 590,336.40 and 127,229.60 is: 190,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,460.40 : 590,336.40 = 127,229.60 : x
  2. Step 2: Convert to fraction form
    393,460.40/590,336.40 = 127,229.60/x
  3. Step 3: Cross multiply
    393,460.40x = 590,336.40 × 127,229.60
  4. Step 4: Simplify right side
    393,460.40x = 75,108,264,037.44
  5. Step 5: Solve for x
    x = 75,108,264,037.44/393,460.40
  6. Step 6: Final answer
    x = 190,891.55

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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.