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Finding the Fourth Proportional to 611.12, 843.23 and 445.38

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Solution

The fourth proportional to 611.12, 843.23 and 445.38 is: 614.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.12 : 843.23 = 445.38 : x
  2. Step 2: Convert to fraction form
    611.12/843.23 = 445.38/x
  3. Step 3: Cross multiply
    611.12x = 843.23 × 445.38
  4. Step 4: Simplify right side
    611.12x = 375,555.55
  5. Step 5: Solve for x
    x = 375,555.55/611.12
  6. Step 6: Final answer
    x = 614.54

Related Problems

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Half scale
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Double scale
Find fourth proportional to 612.12, 844.60 and 446.38
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.