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Finding the Fourth Proportional to 281,768.40, 388,990.08 and 191,605.68

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Solution

The fourth proportional to 281,768.40, 388,990.08 and 191,605.68 is: 264,517.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,768.40 : 388,990.08 = 191,605.68 : x
  2. Step 2: Convert to fraction form
    281,768.40/388,990.08 = 191,605.68/x
  3. Step 3: Cross multiply
    281,768.40x = 388,990.08 × 191,605.68
  4. Step 4: Simplify right side
    281,768.40x = 74,532,708,791.65
  5. Step 5: Solve for x
    x = 74,532,708,791.65/281,768.40
  6. Step 6: Final answer
    x = 264,517.63

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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.