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Finding the Fourth Proportional to 603.44, 905.16 and 213.40

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Solution

The fourth proportional to 603.44, 905.16 and 213.40 is: 320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.44 : 905.16 = 213.40 : x
  2. Step 2: Convert to fraction form
    603.44/905.16 = 213.40/x
  3. Step 3: Cross multiply
    603.44x = 905.16 × 213.40
  4. Step 4: Simplify right side
    603.44x = 193,161.14
  5. Step 5: Solve for x
    x = 193,161.14/603.44
  6. Step 6: Final answer
    x = 320.10

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.