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Finding the Fourth Proportional to 863.06, 1,191.11 and 490.10

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Solution

The fourth proportional to 863.06, 1,191.11 and 490.10 is: 676.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.06 : 1,191.11 = 490.10 : x
  2. Step 2: Convert to fraction form
    863.06/1,191.11 = 490.10/x
  3. Step 3: Cross multiply
    863.06x = 1,191.11 × 490.10
  4. Step 4: Simplify right side
    863.06x = 583,754.60
  5. Step 5: Solve for x
    x = 583,754.60/863.06
  6. Step 6: Final answer
    x = 676.38

Related Problems

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Half scale
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Double scale
Find fourth proportional to 864.06, 1,192.49 and 491.10
Similar ratio
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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.