Home / 389,910.60-538,015.95-220,141.08

Finding the Fourth Proportional to 389,910.60, 538,015.95 and 220,141.08

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Solution

The fourth proportional to 389,910.60, 538,015.95 and 220,141.08 is: 303,760.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,910.60 : 538,015.95 = 220,141.08 : x
  2. Step 2: Convert to fraction form
    389,910.60/538,015.95 = 220,141.08/x
  3. Step 3: Cross multiply
    389,910.60x = 538,015.95 × 220,141.08
  4. Step 4: Simplify right side
    389,910.60x = 118,439,412,290.23
  5. Step 5: Solve for x
    x = 118,439,412,290.23/389,910.60
  6. Step 6: Final answer
    x = 303,760.43

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1.5x scale

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.