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Finding the Fourth Proportional to 312,358.60, 430,878.90 and 197,601.64

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Solution

The fourth proportional to 312,358.60, 430,878.90 and 197,601.64 is: 272,578.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,358.60 : 430,878.90 = 197,601.64 : x
  2. Step 2: Convert to fraction form
    312,358.60/430,878.90 = 197,601.64/x
  3. Step 3: Cross multiply
    312,358.60x = 430,878.90 × 197,601.64
  4. Step 4: Simplify right side
    312,358.60x = 85,142,377,281.40
  5. Step 5: Solve for x
    x = 85,142,377,281.40/312,358.60
  6. Step 6: Final answer
    x = 272,578.94

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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.