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Finding the Fourth Proportional to 456.16, 629.56 and 316.24

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Solution

The fourth proportional to 456.16, 629.56 and 316.24 is: 436.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.16 : 629.56 = 316.24 : x
  2. Step 2: Convert to fraction form
    456.16/629.56 = 316.24/x
  3. Step 3: Cross multiply
    456.16x = 629.56 × 316.24
  4. Step 4: Simplify right side
    456.16x = 199,092.05
  5. Step 5: Solve for x
    x = 199,092.05/456.16
  6. Step 6: Final answer
    x = 436.45

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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.