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Finding the Fourth Proportional to 380,609.90, 570,736.05 and 220,731.27

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Solution

The fourth proportional to 380,609.90, 570,736.05 and 220,731.27 is: 330,993.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,609.90 : 570,736.05 = 220,731.27 : x
  2. Step 2: Convert to fraction form
    380,609.90/570,736.05 = 220,731.27/x
  3. Step 3: Cross multiply
    380,609.90x = 570,736.05 × 220,731.27
  4. Step 4: Simplify right side
    380,609.90x = 125,979,293,151.28
  5. Step 5: Solve for x
    x = 125,979,293,151.28/380,609.90
  6. Step 6: Final answer
    x = 330,993.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.