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Finding the Fourth Proportional to 281,812.42, 388,892.10 and 154,485.28

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Solution

The fourth proportional to 281,812.42, 388,892.10 and 154,485.28 is: 213,184.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,812.42 : 388,892.10 = 154,485.28 : x
  2. Step 2: Convert to fraction form
    281,812.42/388,892.10 = 154,485.28/x
  3. Step 3: Cross multiply
    281,812.42x = 388,892.10 × 154,485.28
  4. Step 4: Simplify right side
    281,812.42x = 60,078,104,958.29
  5. Step 5: Solve for x
    x = 60,078,104,958.29/281,812.42
  6. Step 6: Final answer
    x = 213,184.73

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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.