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Finding the Fourth Proportional to 391,799.44, 540,105.06 and 305,661.52

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Solution

The fourth proportional to 391,799.44, 540,105.06 and 305,661.52 is: 421,361.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,799.44 : 540,105.06 = 305,661.52 : x
  2. Step 2: Convert to fraction form
    391,799.44/540,105.06 = 305,661.52/x
  3. Step 3: Cross multiply
    391,799.44x = 540,105.06 × 305,661.52
  4. Step 4: Simplify right side
    391,799.44x = 165,089,333,599.29
  5. Step 5: Solve for x
    x = 165,089,333,599.29/391,799.44
  6. Step 6: Final answer
    x = 421,361.84

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1.5x scale

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.