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Finding the Fourth Proportional to 393,011.33, 589,641.63 and 140,286.26

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Solution

The fourth proportional to 393,011.33, 589,641.63 and 140,286.26 is: 210,473.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,011.33 : 589,641.63 = 140,286.26 : x
  2. Step 2: Convert to fraction form
    393,011.33/589,641.63 = 140,286.26/x
  3. Step 3: Cross multiply
    393,011.33x = 589,641.63 × 140,286.26
  4. Step 4: Simplify right side
    393,011.33x = 82,718,619,961.03
  5. Step 5: Solve for x
    x = 82,718,619,961.03/393,011.33
  6. Step 6: Final answer
    x = 210,473.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.