Home / 390,579.66-538,974.42-218,467.80

Finding the Fourth Proportional to 390,579.66, 538,974.42 and 218,467.80

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Solution

The fourth proportional to 390,579.66, 538,974.42 and 218,467.80 is: 301,471.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,579.66 : 538,974.42 = 218,467.80 : x
  2. Step 2: Convert to fraction form
    390,579.66/538,974.42 = 218,467.80/x
  3. Step 3: Cross multiply
    390,579.66x = 538,974.42 × 218,467.80
  4. Step 4: Simplify right side
    390,579.66x = 117,748,555,793.68
  5. Step 5: Solve for x
    x = 117,748,555,793.68/390,579.66
  6. Step 6: Final answer
    x = 301,471.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.