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Finding the Fourth Proportional to 389,661.20, 584,550.20 and 165,021.20

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Solution

The fourth proportional to 389,661.20, 584,550.20 and 165,021.20 is: 247,556.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,661.20 : 584,550.20 = 165,021.20 : x
  2. Step 2: Convert to fraction form
    389,661.20/584,550.20 = 165,021.20/x
  3. Step 3: Cross multiply
    389,661.20x = 584,550.20 × 165,021.20
  4. Step 4: Simplify right side
    389,661.20x = 96,463,175,464.24
  5. Step 5: Solve for x
    x = 96,463,175,464.24/389,661.20
  6. Step 6: Final answer
    x = 247,556.53

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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.