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Finding the Fourth Proportional to 456.69, 629.41 and 330.64

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Solution

The fourth proportional to 456.69, 629.41 and 330.64 is: 455.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.69 : 629.41 = 330.64 : x
  2. Step 2: Convert to fraction form
    456.69/629.41 = 330.64/x
  3. Step 3: Cross multiply
    456.69x = 629.41 × 330.64
  4. Step 4: Simplify right side
    456.69x = 208,108.12
  5. Step 5: Solve for x
    x = 208,108.12/456.69
  6. Step 6: Final answer
    x = 455.69

Related Problems

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Double scale
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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.