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Finding the Fourth Proportional to 456.36, 629.34 and 307.32

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Solution

The fourth proportional to 456.36, 629.34 and 307.32 is: 423.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.36 : 629.34 = 307.32 : x
  2. Step 2: Convert to fraction form
    456.36/629.34 = 307.32/x
  3. Step 3: Cross multiply
    456.36x = 629.34 × 307.32
  4. Step 4: Simplify right side
    456.36x = 193,408.77
  5. Step 5: Solve for x
    x = 193,408.77/456.36
  6. Step 6: Final answer
    x = 423.81

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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.