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Finding the Fourth Proportional to 860,991.60, 1,188,169.02 and 479,018.64

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Solution

The fourth proportional to 860,991.60, 1,188,169.02 and 479,018.64 is: 661,046.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,991.60 : 1,188,169.02 = 479,018.64 : x
  2. Step 2: Convert to fraction form
    860,991.60/1,188,169.02 = 479,018.64/x
  3. Step 3: Cross multiply
    860,991.60x = 1,188,169.02 × 479,018.64
  4. Step 4: Simplify right side
    860,991.60x = 569,155,108,050.53
  5. Step 5: Solve for x
    x = 569,155,108,050.53/860,991.60
  6. Step 6: Final answer
    x = 661,046.06

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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.