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Finding the Fourth Proportional to 281,642.63, 388,675.94 and 154,326.42

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Solution

The fourth proportional to 281,642.63, 388,675.94 and 154,326.42 is: 212,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,642.63 : 388,675.94 = 154,326.42 : x
  2. Step 2: Convert to fraction form
    281,642.63/388,675.94 = 154,326.42/x
  3. Step 3: Cross multiply
    281,642.63x = 388,675.94 × 154,326.42
  4. Step 4: Simplify right side
    281,642.63x = 59,982,965,588.70
  5. Step 5: Solve for x
    x = 59,982,965,588.70/281,642.63
  6. Step 6: Final answer
    x = 212,975.45

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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.