Home / 389,971.61-538,171.85-220,231.25

Finding the Fourth Proportional to 389,971.61, 538,171.85 and 220,231.25

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Solution

The fourth proportional to 389,971.61, 538,171.85 and 220,231.25 is: 303,925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,971.61 : 538,171.85 = 220,231.25 : x
  2. Step 2: Convert to fraction form
    389,971.61/538,171.85 = 220,231.25/x
  3. Step 3: Cross multiply
    389,971.61x = 538,171.85 × 220,231.25
  4. Step 4: Simplify right side
    389,971.61x = 118,522,259,240.31
  5. Step 5: Solve for x
    x = 118,522,259,240.31/389,971.61
  6. Step 6: Final answer
    x = 303,925.35

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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.