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Finding the Fourth Proportional to 445.00, 613.63 and 305.32

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Solution

The fourth proportional to 445.00, 613.63 and 305.32 is: 421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.00 : 613.63 = 305.32 : x
  2. Step 2: Convert to fraction form
    445.00/613.63 = 305.32/x
  3. Step 3: Cross multiply
    445.00x = 613.63 × 305.32
  4. Step 4: Simplify right side
    445.00x = 187,351.79
  5. Step 5: Solve for x
    x = 187,351.79/445.00
  6. Step 6: Final answer
    x = 421.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.