Home / 389,911.12-538,016.46-220,141.60

Finding the Fourth Proportional to 389,911.12, 538,016.46 and 220,141.60

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Solution

The fourth proportional to 389,911.12, 538,016.46 and 220,141.60 is: 303,761.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,911.12 : 538,016.46 = 220,141.60 : x
  2. Step 2: Convert to fraction form
    389,911.12/538,016.46 = 220,141.60/x
  3. Step 3: Cross multiply
    389,911.12x = 538,016.46 × 220,141.60
  4. Step 4: Simplify right side
    389,911.12x = 118,439,804,330.74
  5. Step 5: Solve for x
    x = 118,439,804,330.74/389,911.12
  6. Step 6: Final answer
    x = 303,761.03

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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.