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Finding the Fourth Proportional to 281,744.40, 388,805.48 and 154,427.92

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Solution

The fourth proportional to 281,744.40, 388,805.48 and 154,427.92 is: 213,109.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,744.40 : 388,805.48 = 154,427.92 : x
  2. Step 2: Convert to fraction form
    281,744.40/388,805.48 = 154,427.92/x
  3. Step 3: Cross multiply
    281,744.40x = 388,805.48 × 154,427.92
  4. Step 4: Simplify right side
    281,744.40x = 60,042,421,561.00
  5. Step 5: Solve for x
    x = 60,042,421,561.00/281,744.40
  6. Step 6: Final answer
    x = 213,109.55

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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.