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Finding the Fourth Proportional to 281,753.44, 388,819.74 and 154,426.30

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Solution

The fourth proportional to 281,753.44, 388,819.74 and 154,426.30 is: 213,108.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,753.44 : 388,819.74 = 154,426.30 : x
  2. Step 2: Convert to fraction form
    281,753.44/388,819.74 = 154,426.30/x
  3. Step 3: Cross multiply
    281,753.44x = 388,819.74 × 154,426.30
  4. Step 4: Simplify right side
    281,753.44x = 60,043,993,422.21
  5. Step 5: Solve for x
    x = 60,043,993,422.21/281,753.44
  6. Step 6: Final answer
    x = 213,108.29

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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.