Home / 386,388.49-579,749.60-209,020.36

Finding the Fourth Proportional to 386,388.49, 579,749.60 and 209,020.36

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Solution

The fourth proportional to 386,388.49, 579,749.60 and 209,020.36 is: 313,620.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,388.49 : 579,749.60 = 209,020.36 : x
  2. Step 2: Convert to fraction form
    386,388.49/579,749.60 = 209,020.36/x
  3. Step 3: Cross multiply
    386,388.49x = 579,749.60 × 209,020.36
  4. Step 4: Simplify right side
    386,388.49x = 121,179,470,101.86
  5. Step 5: Solve for x
    x = 121,179,470,101.86/386,388.49
  6. Step 6: Final answer
    x = 313,620.81

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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.