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Finding the Fourth Proportional to 281,990.68, 389,147.70 and 154,667.32

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Solution

The fourth proportional to 281,990.68, 389,147.70 and 154,667.32 is: 213,441.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,990.68 : 389,147.70 = 154,667.32 : x
  2. Step 2: Convert to fraction form
    281,990.68/389,147.70 = 154,667.32/x
  3. Step 3: Cross multiply
    281,990.68x = 389,147.70 × 154,667.32
  4. Step 4: Simplify right side
    281,990.68x = 60,188,431,843.16
  5. Step 5: Solve for x
    x = 60,188,431,843.16/281,990.68
  6. Step 6: Final answer
    x = 213,441.21

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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.