Home / 390,201.24-538,475.82-218,119.17

Finding the Fourth Proportional to 390,201.24, 538,475.82 and 218,119.17

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Solution

The fourth proportional to 390,201.24, 538,475.82 and 218,119.17 is: 301,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,201.24 : 538,475.82 = 218,119.17 : x
  2. Step 2: Convert to fraction form
    390,201.24/538,475.82 = 218,119.17/x
  3. Step 3: Cross multiply
    390,201.24x = 538,475.82 × 218,119.17
  4. Step 4: Simplify right side
    390,201.24x = 117,451,898,923.47
  5. Step 5: Solve for x
    x = 117,451,898,923.47/390,201.24
  6. Step 6: Final answer
    x = 301,003.40

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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.