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Finding the Fourth Proportional to 665,670.20, 998,505.30 and 192,403.40

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Solution

The fourth proportional to 665,670.20, 998,505.30 and 192,403.40 is: 288,605.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,670.20 : 998,505.30 = 192,403.40 : x
  2. Step 2: Convert to fraction form
    665,670.20/998,505.30 = 192,403.40/x
  3. Step 3: Cross multiply
    665,670.20x = 998,505.30 × 192,403.40
  4. Step 4: Simplify right side
    665,670.20x = 192,115,814,638.02
  5. Step 5: Solve for x
    x = 192,115,814,638.02/665,670.20
  6. Step 6: Final answer
    x = 288,605.10

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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.