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Finding the Fourth Proportional to 281,959.95, 389,105.19 and 154,636.32

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Solution

The fourth proportional to 281,959.95, 389,105.19 and 154,636.32 is: 213,398.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,959.95 : 389,105.19 = 154,636.32 : x
  2. Step 2: Convert to fraction form
    281,959.95/389,105.19 = 154,636.32/x
  3. Step 3: Cross multiply
    281,959.95x = 389,105.19 × 154,636.32
  4. Step 4: Simplify right side
    281,959.95x = 60,169,794,674.50
  5. Step 5: Solve for x
    x = 60,169,794,674.50/281,959.95
  6. Step 6: Final answer
    x = 213,398.37

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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.