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Finding the Fourth Proportional to 400,856.80, 601,285.20 and 190,904.80

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Solution

The fourth proportional to 400,856.80, 601,285.20 and 190,904.80 is: 286,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,856.80 : 601,285.20 = 190,904.80 : x
  2. Step 2: Convert to fraction form
    400,856.80/601,285.20 = 190,904.80/x
  3. Step 3: Cross multiply
    400,856.80x = 601,285.20 × 190,904.80
  4. Step 4: Simplify right side
    400,856.80x = 114,788,230,848.96
  5. Step 5: Solve for x
    x = 114,788,230,848.96/400,856.80
  6. Step 6: Final answer
    x = 286,357.20

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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.