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Finding the Fourth Proportional to 455.36, 626.50 and 443.20

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Solution

The fourth proportional to 455.36, 626.50 and 443.20 is: 609.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.36 : 626.50 = 443.20 : x
  2. Step 2: Convert to fraction form
    455.36/626.50 = 443.20/x
  3. Step 3: Cross multiply
    455.36x = 626.50 × 443.20
  4. Step 4: Simplify right side
    455.36x = 277,664.80
  5. Step 5: Solve for x
    x = 277,664.80/455.36
  6. Step 6: Final answer
    x = 609.77

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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.