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Finding the Fourth Proportional to 281,520.80, 388,500 and 154,196

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Solution

The fourth proportional to 281,520.80, 388,500 and 154,196 is: 212,791.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,520.80 : 388,500 = 154,196 : x
  2. Step 2: Convert to fraction form
    281,520.80/388,500 = 154,196/x
  3. Step 3: Cross multiply
    281,520.80x = 388,500 × 154,196
  4. Step 4: Simplify right side
    281,520.80x = 59,905,146,000
  5. Step 5: Solve for x
    x = 59,905,146,000/281,520.80
  6. Step 6: Final answer
    x = 212,791.19

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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.