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Finding the Fourth Proportional to 860.03, 1,185.11 and 623.57

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Solution

The fourth proportional to 860.03, 1,185.11 and 623.57 is: 859.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.03 : 1,185.11 = 623.57 : x
  2. Step 2: Convert to fraction form
    860.03/1,185.11 = 623.57/x
  3. Step 3: Cross multiply
    860.03x = 1,185.11 × 623.57
  4. Step 4: Simplify right side
    860.03x = 738,990.00
  5. Step 5: Solve for x
    x = 738,990.00/860.03
  6. Step 6: Final answer
    x = 859.27

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Double scale
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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.