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Finding the Fourth Proportional to 281,616.75, 388,631.12 and 154,295.28

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Solution

The fourth proportional to 281,616.75, 388,631.12 and 154,295.28 is: 212,927.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,616.75 : 388,631.12 = 154,295.28 : x
  2. Step 2: Convert to fraction form
    281,616.75/388,631.12 = 154,295.28/x
  3. Step 3: Cross multiply
    281,616.75x = 388,631.12 × 154,295.28
  4. Step 4: Simplify right side
    281,616.75x = 59,963,946,705.64
  5. Step 5: Solve for x
    x = 59,963,946,705.64/281,616.75
  6. Step 6: Final answer
    x = 212,927.49

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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.