Home / 387,439.58-580,076.80-209,308.43

Finding the Fourth Proportional to 387,439.58, 580,076.80 and 209,308.43

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Solution

The fourth proportional to 387,439.58, 580,076.80 and 209,308.43 is: 313,377.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,439.58 : 580,076.80 = 209,308.43 : x
  2. Step 2: Convert to fraction form
    387,439.58/580,076.80 = 209,308.43/x
  3. Step 3: Cross multiply
    387,439.58x = 580,076.80 × 209,308.43
  4. Step 4: Simplify right side
    387,439.58x = 121,414,964,287.42
  5. Step 5: Solve for x
    x = 121,414,964,287.42/387,439.58
  6. Step 6: Final answer
    x = 313,377.80

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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.