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Finding the Fourth Proportional to 395.98, 591.11 and 378.22

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Solution

The fourth proportional to 395.98, 591.11 and 378.22 is: 564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.98 : 591.11 = 378.22 : x
  2. Step 2: Convert to fraction form
    395.98/591.11 = 378.22/x
  3. Step 3: Cross multiply
    395.98x = 591.11 × 378.22
  4. Step 4: Simplify right side
    395.98x = 223,569.62
  5. Step 5: Solve for x
    x = 223,569.62/395.98
  6. Step 6: Final answer
    x = 564.60

Related Problems

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.