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Finding the Fourth Proportional to 603.55, 905.33 and 315.55

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Solution

The fourth proportional to 603.55, 905.33 and 315.55 is: 473.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.55 : 905.33 = 315.55 : x
  2. Step 2: Convert to fraction form
    603.55/905.33 = 315.55/x
  3. Step 3: Cross multiply
    603.55x = 905.33 × 315.55
  4. Step 4: Simplify right side
    603.55x = 285,676.88
  5. Step 5: Solve for x
    x = 285,676.88/603.55
  6. Step 6: Final answer
    x = 473.33

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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.