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Finding the Fourth Proportional to 347,879.60, 521,128.20 and 189,825.20

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Solution

The fourth proportional to 347,879.60, 521,128.20 and 189,825.20 is: 284,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,879.60 : 521,128.20 = 189,825.20 : x
  2. Step 2: Convert to fraction form
    347,879.60/521,128.20 = 189,825.20/x
  3. Step 3: Cross multiply
    347,879.60x = 521,128.20 × 189,825.20
  4. Step 4: Simplify right side
    347,879.60x = 98,923,264,790.64
  5. Step 5: Solve for x
    x = 98,923,264,790.64/347,879.60
  6. Step 6: Final answer
    x = 284,360.64

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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.