Home / 389,929.68-538,135.92-220,194.72

Finding the Fourth Proportional to 389,929.68, 538,135.92 and 220,194.72

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Solution

The fourth proportional to 389,929.68, 538,135.92 and 220,194.72 is: 303,887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,929.68 : 538,135.92 = 220,194.72 : x
  2. Step 2: Convert to fraction form
    389,929.68/538,135.92 = 220,194.72/x
  3. Step 3: Cross multiply
    389,929.68x = 538,135.92 × 220,194.72
  4. Step 4: Simplify right side
    389,929.68x = 118,494,688,226.34
  5. Step 5: Solve for x
    x = 118,494,688,226.34/389,929.68
  6. Step 6: Final answer
    x = 303,887.33

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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.