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Finding the Fourth Proportional to 666,187.20, 998,788.32 and 345,879.18

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Solution

The fourth proportional to 666,187.20, 998,788.32 and 345,879.18 is: 518,563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,187.20 : 998,788.32 = 345,879.18 : x
  2. Step 2: Convert to fraction form
    666,187.20/998,788.32 = 345,879.18/x
  3. Step 3: Cross multiply
    666,187.20x = 998,788.32 × 345,879.18
  4. Step 4: Simplify right side
    666,187.20x = 345,460,085,115.18
  5. Step 5: Solve for x
    x = 345,460,085,115.18/666,187.20
  6. Step 6: Final answer
    x = 518,563.08

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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.