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Finding the Fourth Proportional to 393,109.38, 589,660.83 and 112,626.90

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Solution

The fourth proportional to 393,109.38, 589,660.83 and 112,626.90 is: 168,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,109.38 : 589,660.83 = 112,626.90 : x
  2. Step 2: Convert to fraction form
    393,109.38/589,660.83 = 112,626.90/x
  3. Step 3: Cross multiply
    393,109.38x = 589,660.83 × 112,626.90
  4. Step 4: Simplify right side
    393,109.38x = 66,411,671,334.33
  5. Step 5: Solve for x
    x = 66,411,671,334.33/393,109.38
  6. Step 6: Final answer
    x = 168,939.42

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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.