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Finding the Fourth Proportional to 830.85, 1,146.72 and 481.54

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Solution

The fourth proportional to 830.85, 1,146.72 and 481.54 is: 664.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.85 : 1,146.72 = 481.54 : x
  2. Step 2: Convert to fraction form
    830.85/1,146.72 = 481.54/x
  3. Step 3: Cross multiply
    830.85x = 1,146.72 × 481.54
  4. Step 4: Simplify right side
    830.85x = 552,191.55
  5. Step 5: Solve for x
    x = 552,191.55/830.85
  6. Step 6: Final answer
    x = 664.61

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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.