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Finding the Fourth Proportional to 391,944.32, 540,879.36 and 213,096.32

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Solution

The fourth proportional to 391,944.32, 540,879.36 and 213,096.32 is: 294,070.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,944.32 : 540,879.36 = 213,096.32 : x
  2. Step 2: Convert to fraction form
    391,944.32/540,879.36 = 213,096.32/x
  3. Step 3: Cross multiply
    391,944.32x = 540,879.36 × 213,096.32
  4. Step 4: Simplify right side
    391,944.32x = 115,259,401,179.96
  5. Step 5: Solve for x
    x = 115,259,401,179.96/391,944.32
  6. Step 6: Final answer
    x = 294,070.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.