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Finding the Fourth Proportional to 281,414.85, 388,348.63 and 154,090.45

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Solution

The fourth proportional to 281,414.85, 388,348.63 and 154,090.45 is: 212,642.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,414.85 : 388,348.63 = 154,090.45 : x
  2. Step 2: Convert to fraction form
    281,414.85/388,348.63 = 154,090.45/x
  3. Step 3: Cross multiply
    281,414.85x = 388,348.63 × 154,090.45
  4. Step 4: Simplify right side
    281,414.85x = 59,840,815,153.58
  5. Step 5: Solve for x
    x = 59,840,815,153.58/281,414.85
  6. Step 6: Final answer
    x = 212,642.71

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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.