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Finding the Fourth Proportional to 281,675.34, 388,721.43 and 154,349.82

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Solution

The fourth proportional to 281,675.34, 388,721.43 and 154,349.82 is: 213,007.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,675.34 : 388,721.43 = 154,349.82 : x
  2. Step 2: Convert to fraction form
    281,675.34/388,721.43 = 154,349.82/x
  3. Step 3: Cross multiply
    281,675.34x = 388,721.43 × 154,349.82
  4. Step 4: Simplify right side
    281,675.34x = 59,999,082,750.64
  5. Step 5: Solve for x
    x = 59,999,082,750.64/281,675.34
  6. Step 6: Final answer
    x = 213,007.94

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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.