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Finding the Fourth Proportional to 886.46, 1,223.48 and 513.38

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Solution

The fourth proportional to 886.46, 1,223.48 and 513.38 is: 708.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.46 : 1,223.48 = 513.38 : x
  2. Step 2: Convert to fraction form
    886.46/1,223.48 = 513.38/x
  3. Step 3: Cross multiply
    886.46x = 1,223.48 × 513.38
  4. Step 4: Simplify right side
    886.46x = 628,110.16
  5. Step 5: Solve for x
    x = 628,110.16/886.46
  6. Step 6: Final answer
    x = 708.56

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Double scale
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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.