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Finding the Fourth Proportional to 287,678.72, 396,927.60 and 185,682.58

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Solution

The fourth proportional to 287,678.72, 396,927.60 and 185,682.58 is: 256,197.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,678.72 : 396,927.60 = 185,682.58 : x
  2. Step 2: Convert to fraction form
    287,678.72/396,927.60 = 185,682.58/x
  3. Step 3: Cross multiply
    287,678.72x = 396,927.60 × 185,682.58
  4. Step 4: Simplify right side
    287,678.72x = 73,702,540,841.21
  5. Step 5: Solve for x
    x = 73,702,540,841.21/287,678.72
  6. Step 6: Final answer
    x = 256,197.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.