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Finding the Fourth Proportional to 281,721.65, 388,773.64 and 154,396.94

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Solution

The fourth proportional to 281,721.65, 388,773.64 and 154,396.94 is: 213,066.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,721.65 : 388,773.64 = 154,396.94 : x
  2. Step 2: Convert to fraction form
    281,721.65/388,773.64 = 154,396.94/x
  3. Step 3: Cross multiply
    281,721.65x = 388,773.64 × 154,396.94
  4. Step 4: Simplify right side
    281,721.65x = 60,025,460,368.66
  5. Step 5: Solve for x
    x = 60,025,460,368.66/281,721.65
  6. Step 6: Final answer
    x = 213,066.55

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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.