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Finding the Fourth Proportional to 523.05, 721.77 and 290.19

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Solution

The fourth proportional to 523.05, 721.77 and 290.19 is: 400.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.05 : 721.77 = 290.19 : x
  2. Step 2: Convert to fraction form
    523.05/721.77 = 290.19/x
  3. Step 3: Cross multiply
    523.05x = 721.77 × 290.19
  4. Step 4: Simplify right side
    523.05x = 209,450.44
  5. Step 5: Solve for x
    x = 209,450.44/523.05
  6. Step 6: Final answer
    x = 400.44

Related Problems

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Double scale
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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.