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Finding the Fourth Proportional to 281,326.91, 388,231.79 and 154,010.70

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Solution

The fourth proportional to 281,326.91, 388,231.79 and 154,010.70 is: 212,535.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,326.91 : 388,231.79 = 154,010.70 : x
  2. Step 2: Convert to fraction form
    281,326.91/388,231.79 = 154,010.70/x
  3. Step 3: Cross multiply
    281,326.91x = 388,231.79 × 154,010.70
  4. Step 4: Simplify right side
    281,326.91x = 59,791,848,970.10
  5. Step 5: Solve for x
    x = 59,791,848,970.10/281,326.91
  6. Step 6: Final answer
    x = 212,535.13

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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.