Home / 389,784.56-538,006.68-220,118

Finding the Fourth Proportional to 389,784.56, 538,006.68 and 220,118

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Solution

The fourth proportional to 389,784.56, 538,006.68 and 220,118 is: 303,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,784.56 : 538,006.68 = 220,118 : x
  2. Step 2: Convert to fraction form
    389,784.56/538,006.68 = 220,118/x
  3. Step 3: Cross multiply
    389,784.56x = 538,006.68 × 220,118
  4. Step 4: Simplify right side
    389,784.56x = 118,424,954,388.24
  5. Step 5: Solve for x
    x = 118,424,954,388.24/389,784.56
  6. Step 6: Final answer
    x = 303,821.56

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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.