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Finding the Fourth Proportional to 388,620.12, 582,951.06 and 122,401.47

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Solution

The fourth proportional to 388,620.12, 582,951.06 and 122,401.47 is: 183,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,620.12 : 582,951.06 = 122,401.47 : x
  2. Step 2: Convert to fraction form
    388,620.12/582,951.06 = 122,401.47/x
  3. Step 3: Cross multiply
    388,620.12x = 582,951.06 × 122,401.47
  4. Step 4: Simplify right side
    388,620.12x = 71,354,066,682.06
  5. Step 5: Solve for x
    x = 71,354,066,682.06/388,620.12
  6. Step 6: Final answer
    x = 183,608.78

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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.