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Finding the Fourth Proportional to 389,556.54, 584,283.78 and 123,318.45

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Solution

The fourth proportional to 389,556.54, 584,283.78 and 123,318.45 is: 184,961.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,556.54 : 584,283.78 = 123,318.45 : x
  2. Step 2: Convert to fraction form
    389,556.54/584,283.78 = 123,318.45/x
  3. Step 3: Cross multiply
    389,556.54x = 584,283.78 × 123,318.45
  4. Step 4: Simplify right side
    389,556.54x = 72,052,970,109.74
  5. Step 5: Solve for x
    x = 72,052,970,109.74/389,556.54
  6. Step 6: Final answer
    x = 184,961.52

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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.