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Finding the Fourth Proportional to 391,994.42, 540,919.62 and 219,888.45

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Solution

The fourth proportional to 391,994.42, 540,919.62 and 219,888.45 is: 303,427.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,994.42 : 540,919.62 = 219,888.45 : x
  2. Step 2: Convert to fraction form
    391,994.42/540,919.62 = 219,888.45/x
  3. Step 3: Cross multiply
    391,994.42x = 540,919.62 × 219,888.45
  4. Step 4: Simplify right side
    391,994.42x = 118,941,976,816.39
  5. Step 5: Solve for x
    x = 118,941,976,816.39/391,994.42
  6. Step 6: Final answer
    x = 303,427.73

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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.