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Finding the Fourth Proportional to 287,410.60, 396,627.03 and 156,587.61

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Solution

The fourth proportional to 287,410.60, 396,627.03 and 156,587.61 is: 216,091.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,410.60 : 396,627.03 = 156,587.61 : x
  2. Step 2: Convert to fraction form
    287,410.60/396,627.03 = 156,587.61/x
  3. Step 3: Cross multiply
    287,410.60x = 396,627.03 × 156,587.61
  4. Step 4: Simplify right side
    287,410.60x = 62,106,876,829.91
  5. Step 5: Solve for x
    x = 62,106,876,829.91/287,410.60
  6. Step 6: Final answer
    x = 216,091.11

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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.