Home / 389,866.75-538,016.25-220,111.81

Finding the Fourth Proportional to 389,866.75, 538,016.25 and 220,111.81

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Solution

The fourth proportional to 389,866.75, 538,016.25 and 220,111.81 is: 303,754.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,866.75 : 538,016.25 = 220,111.81 : x
  2. Step 2: Convert to fraction form
    389,866.75/538,016.25 = 220,111.81/x
  3. Step 3: Cross multiply
    389,866.75x = 538,016.25 × 220,111.81
  4. Step 4: Simplify right side
    389,866.75x = 118,423,730,596.91
  5. Step 5: Solve for x
    x = 118,423,730,596.91/389,866.75
  6. Step 6: Final answer
    x = 303,754.37

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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.