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Finding the Fourth Proportional to 886.37, 1,222.98 and 665.85

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Solution

The fourth proportional to 886.37, 1,222.98 and 665.85 is: 918.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.37 : 1,222.98 = 665.85 : x
  2. Step 2: Convert to fraction form
    886.37/1,222.98 = 665.85/x
  3. Step 3: Cross multiply
    886.37x = 1,222.98 × 665.85
  4. Step 4: Simplify right side
    886.37x = 814,321.23
  5. Step 5: Solve for x
    x = 814,321.23/886.37
  6. Step 6: Final answer
    x = 918.71

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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.