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Finding the Fourth Proportional to 399,090.28, 550,743.46 and 220,241

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Solution

The fourth proportional to 399,090.28, 550,743.46 and 220,241 is: 303,931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,090.28 : 550,743.46 = 220,241 : x
  2. Step 2: Convert to fraction form
    399,090.28/550,743.46 = 220,241/x
  3. Step 3: Cross multiply
    399,090.28x = 550,743.46 × 220,241
  4. Step 4: Simplify right side
    399,090.28x = 121,296,290,373.86
  5. Step 5: Solve for x
    x = 121,296,290,373.86/399,090.28
  6. Step 6: Final answer
    x = 303,931.96

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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.