Home / 389,968.67-538,167.80-220,228.31

Finding the Fourth Proportional to 389,968.67, 538,167.80 and 220,228.31

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Solution

The fourth proportional to 389,968.67, 538,167.80 and 220,228.31 is: 303,921.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,968.67 : 538,167.80 = 220,228.31 : x
  2. Step 2: Convert to fraction form
    389,968.67/538,167.80 = 220,228.31/x
  3. Step 3: Cross multiply
    389,968.67x = 538,167.80 × 220,228.31
  4. Step 4: Simplify right side
    389,968.67x = 118,519,785,090.42
  5. Step 5: Solve for x
    x = 118,519,785,090.42/389,968.67
  6. Step 6: Final answer
    x = 303,921.30

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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.