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Finding the Fourth Proportional to 281,872.67, 388,981.37 and 154,548.05

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Solution

The fourth proportional to 281,872.67, 388,981.37 and 154,548.05 is: 213,274.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,872.67 : 388,981.37 = 154,548.05 : x
  2. Step 2: Convert to fraction form
    281,872.67/388,981.37 = 154,548.05/x
  3. Step 3: Cross multiply
    281,872.67x = 388,981.37 × 154,548.05
  4. Step 4: Simplify right side
    281,872.67x = 60,116,310,661.29
  5. Step 5: Solve for x
    x = 60,116,310,661.29/281,872.67
  6. Step 6: Final answer
    x = 213,274.71

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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.