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Finding the Fourth Proportional to 838,893.80, 1,258,340.70 and 277,928.30

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Solution

The fourth proportional to 838,893.80, 1,258,340.70 and 277,928.30 is: 416,892.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,893.80 : 1,258,340.70 = 277,928.30 : x
  2. Step 2: Convert to fraction form
    838,893.80/1,258,340.70 = 277,928.30/x
  3. Step 3: Cross multiply
    838,893.80x = 1,258,340.70 × 277,928.30
  4. Step 4: Simplify right side
    838,893.80x = 349,728,491,571.81
  5. Step 5: Solve for x
    x = 349,728,491,571.81/838,893.80
  6. Step 6: Final answer
    x = 416,892.45

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Half scale
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Double scale
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Similar ratio
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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.