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Finding the Fourth Proportional to 603.97, 905.21 and 344.19

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Solution

The fourth proportional to 603.97, 905.21 and 344.19 is: 515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.97 : 905.21 = 344.19 : x
  2. Step 2: Convert to fraction form
    603.97/905.21 = 344.19/x
  3. Step 3: Cross multiply
    603.97x = 905.21 × 344.19
  4. Step 4: Simplify right side
    603.97x = 311,564.23
  5. Step 5: Solve for x
    x = 311,564.23/603.97
  6. Step 6: Final answer
    x = 515.86

Related Problems

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Half scale
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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.