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Finding the Fourth Proportional to 281,745.40, 388,806.86 and 154,428.92

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Solution

The fourth proportional to 281,745.40, 388,806.86 and 154,428.92 is: 213,110.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,745.40 : 388,806.86 = 154,428.92 : x
  2. Step 2: Convert to fraction form
    281,745.40/388,806.86 = 154,428.92/x
  3. Step 3: Cross multiply
    281,745.40x = 388,806.86 × 154,428.92
  4. Step 4: Simplify right side
    281,745.40x = 60,043,023,478.39
  5. Step 5: Solve for x
    x = 60,043,023,478.39/281,745.40
  6. Step 6: Final answer
    x = 213,110.93

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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.