Home / 389,909.76-538,045.44-220,160.64

Finding the Fourth Proportional to 389,909.76, 538,045.44 and 220,160.64

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Solution

The fourth proportional to 389,909.76, 538,045.44 and 220,160.64 is: 303,804.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,909.76 : 538,045.44 = 220,160.64 : x
  2. Step 2: Convert to fraction form
    389,909.76/538,045.44 = 220,160.64/x
  3. Step 3: Cross multiply
    389,909.76x = 538,045.44 × 220,160.64
  4. Step 4: Simplify right side
    389,909.76x = 118,456,428,419.48
  5. Step 5: Solve for x
    x = 118,456,428,419.48/389,909.76
  6. Step 6: Final answer
    x = 303,804.73

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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.