Home / 387,440.58-580,078.30-209,309.43

Finding the Fourth Proportional to 387,440.58, 580,078.30 and 209,309.43

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Solution

The fourth proportional to 387,440.58, 580,078.30 and 209,309.43 is: 313,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,440.58 : 580,078.30 = 209,309.43 : x
  2. Step 2: Convert to fraction form
    387,440.58/580,078.30 = 209,309.43/x
  3. Step 3: Cross multiply
    387,440.58x = 580,078.30 × 209,309.43
  4. Step 4: Simplify right side
    387,440.58x = 121,415,858,328.37
  5. Step 5: Solve for x
    x = 121,415,858,328.37/387,440.58
  6. Step 6: Final answer
    x = 313,379.30

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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.