Home / 389,884.76-538,010.94-220,135.64

Finding the Fourth Proportional to 389,884.76, 538,010.94 and 220,135.64

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Solution

The fourth proportional to 389,884.76, 538,010.94 and 220,135.64 is: 303,770.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,884.76 : 538,010.94 = 220,135.64 : x
  2. Step 2: Convert to fraction form
    389,884.76/538,010.94 = 220,135.64/x
  3. Step 3: Cross multiply
    389,884.76x = 538,010.94 × 220,135.64
  4. Step 4: Simplify right side
    389,884.76x = 118,435,382,603.90
  5. Step 5: Solve for x
    x = 118,435,382,603.90/389,884.76
  6. Step 6: Final answer
    x = 303,770.23

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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.