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Finding the Fourth Proportional to 403.45, 604.73 and 305.64

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Solution

The fourth proportional to 403.45, 604.73 and 305.64 is: 458.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.45 : 604.73 = 305.64 : x
  2. Step 2: Convert to fraction form
    403.45/604.73 = 305.64/x
  3. Step 3: Cross multiply
    403.45x = 604.73 × 305.64
  4. Step 4: Simplify right side
    403.45x = 184,830.44
  5. Step 5: Solve for x
    x = 184,830.44/403.45
  6. Step 6: Final answer
    x = 458.13

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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.