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Finding the Fourth Proportional to 281,386.62, 388,310.10 and 154,059.48

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Solution

The fourth proportional to 281,386.62, 388,310.10 and 154,059.48 is: 212,600.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,386.62 : 388,310.10 = 154,059.48 : x
  2. Step 2: Convert to fraction form
    281,386.62/388,310.10 = 154,059.48/x
  3. Step 3: Cross multiply
    281,386.62x = 388,310.10 × 154,059.48
  4. Step 4: Simplify right side
    281,386.62x = 59,822,852,084.75
  5. Step 5: Solve for x
    x = 59,822,852,084.75/281,386.62
  6. Step 6: Final answer
    x = 212,600.20

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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.