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Finding the Fourth Proportional to 857.53, 1,183.41 and 525.77

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Solution

The fourth proportional to 857.53, 1,183.41 and 525.77 is: 725.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.53 : 1,183.41 = 525.77 : x
  2. Step 2: Convert to fraction form
    857.53/1,183.41 = 525.77/x
  3. Step 3: Cross multiply
    857.53x = 1,183.41 × 525.77
  4. Step 4: Simplify right side
    857.53x = 622,197.53
  5. Step 5: Solve for x
    x = 622,197.53/857.53
  6. Step 6: Final answer
    x = 725.57

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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.