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Finding the Fourth Proportional to 380,541.12, 570,843.36 and 127,809.60

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Solution

The fourth proportional to 380,541.12, 570,843.36 and 127,809.60 is: 191,725.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,541.12 : 570,843.36 = 127,809.60 : x
  2. Step 2: Convert to fraction form
    380,541.12/570,843.36 = 127,809.60/x
  3. Step 3: Cross multiply
    380,541.12x = 570,843.36 × 127,809.60
  4. Step 4: Simplify right side
    380,541.12x = 72,959,261,504.26
  5. Step 5: Solve for x
    x = 72,959,261,504.26/380,541.12
  6. Step 6: Final answer
    x = 191,725.04

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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.