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Finding the Fourth Proportional to 695,920.80, 972,189.60 and 695,920.80

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Solution

The fourth proportional to 695,920.80, 972,189.60 and 695,920.80 is: 972,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,920.80 : 972,189.60 = 695,920.80 : x
  2. Step 2: Convert to fraction form
    695,920.80/972,189.60 = 695,920.80/x
  3. Step 3: Cross multiply
    695,920.80x = 972,189.60 × 695,920.80
  4. Step 4: Simplify right side
    695,920.80x = 676,566,964,183.68
  5. Step 5: Solve for x
    x = 676,566,964,183.68/695,920.80
  6. Step 6: Final answer
    x = 972,189.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.