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Finding the Fourth Proportional to 281,331.42, 388,238.01 and 154,015.20

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Solution

The fourth proportional to 281,331.42, 388,238.01 and 154,015.20 is: 212,541.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,331.42 : 388,238.01 = 154,015.20 : x
  2. Step 2: Convert to fraction form
    281,331.42/388,238.01 = 154,015.20/x
  3. Step 3: Cross multiply
    281,331.42x = 388,238.01 × 154,015.20
  4. Step 4: Simplify right side
    281,331.42x = 59,794,554,757.75
  5. Step 5: Solve for x
    x = 59,794,554,757.75/281,331.42
  6. Step 6: Final answer
    x = 212,541.33

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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.