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Finding the Fourth Proportional to 619,400.70, 929,101.05 and 198,719.10

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Solution

The fourth proportional to 619,400.70, 929,101.05 and 198,719.10 is: 298,078.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,400.70 : 929,101.05 = 198,719.10 : x
  2. Step 2: Convert to fraction form
    619,400.70/929,101.05 = 198,719.10/x
  3. Step 3: Cross multiply
    619,400.70x = 929,101.05 × 198,719.10
  4. Step 4: Simplify right side
    619,400.70x = 184,630,124,465.06
  5. Step 5: Solve for x
    x = 184,630,124,465.06/619,400.70
  6. Step 6: Final answer
    x = 298,078.65

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Double scale
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Similar ratio
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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.