Home / 389,931.93-538,139.03-220,196.97

Finding the Fourth Proportional to 389,931.93, 538,139.03 and 220,196.97

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Solution

The fourth proportional to 389,931.93, 538,139.03 and 220,196.97 is: 303,890.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,931.93 : 538,139.03 = 220,196.97 : x
  2. Step 2: Convert to fraction form
    389,931.93/538,139.03 = 220,196.97/x
  3. Step 3: Cross multiply
    389,931.93x = 538,139.03 × 220,196.97
  4. Step 4: Simplify right side
    389,931.93x = 118,496,582,743.75
  5. Step 5: Solve for x
    x = 118,496,582,743.75/389,931.93
  6. Step 6: Final answer
    x = 303,890.43

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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.