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Finding the Fourth Proportional to 287,000.80, 430,695.60 and 186,917.20

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Solution

The fourth proportional to 287,000.80, 430,695.60 and 186,917.20 is: 280,502.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,000.80 : 430,695.60 = 186,917.20 : x
  2. Step 2: Convert to fraction form
    287,000.80/430,695.60 = 186,917.20/x
  3. Step 3: Cross multiply
    287,000.80x = 430,695.60 × 186,917.20
  4. Step 4: Simplify right side
    287,000.80x = 80,504,415,604.32
  5. Step 5: Solve for x
    x = 80,504,415,604.32/287,000.80
  6. Step 6: Final answer
    x = 280,502.41

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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.