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Finding the Fourth Proportional to 281,745.34, 388,806.38 and 154,420.63

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Solution

The fourth proportional to 281,745.34, 388,806.38 and 154,420.63 is: 213,099.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,745.34 : 388,806.38 = 154,420.63 : x
  2. Step 2: Convert to fraction form
    281,745.34/388,806.38 = 154,420.63/x
  3. Step 3: Cross multiply
    281,745.34x = 388,806.38 × 154,420.63
  4. Step 4: Simplify right side
    281,745.34x = 60,039,724,982.58
  5. Step 5: Solve for x
    x = 60,039,724,982.58/281,745.34
  6. Step 6: Final answer
    x = 213,099.27

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1.5x scale

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.