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Finding the Fourth Proportional to 393,436.08, 541,993.44 and 312,837.84

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Solution

The fourth proportional to 393,436.08, 541,993.44 and 312,837.84 is: 430,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,436.08 : 541,993.44 = 312,837.84 : x
  2. Step 2: Convert to fraction form
    393,436.08/541,993.44 = 312,837.84/x
  3. Step 3: Cross multiply
    393,436.08x = 541,993.44 × 312,837.84
  4. Step 4: Simplify right side
    393,436.08x = 169,556,057,063.77
  5. Step 5: Solve for x
    x = 169,556,057,063.77/393,436.08
  6. Step 6: Final answer
    x = 430,962.15

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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.