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Finding the Fourth Proportional to 603.96, 906.30 and 315.42

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Solution

The fourth proportional to 603.96, 906.30 and 315.42 is: 473.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.96 : 906.30 = 315.42 : x
  2. Step 2: Convert to fraction form
    603.96/906.30 = 315.42/x
  3. Step 3: Cross multiply
    603.96x = 906.30 × 315.42
  4. Step 4: Simplify right side
    603.96x = 285,865.15
  5. Step 5: Solve for x
    x = 285,865.15/603.96
  6. Step 6: Final answer
    x = 473.32

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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.