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Finding the Fourth Proportional to 456.23, 629.57 and 279.48

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Solution

The fourth proportional to 456.23, 629.57 and 279.48 is: 385.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.23 : 629.57 = 279.48 : x
  2. Step 2: Convert to fraction form
    456.23/629.57 = 279.48/x
  3. Step 3: Cross multiply
    456.23x = 629.57 × 279.48
  4. Step 4: Simplify right side
    456.23x = 175,952.22
  5. Step 5: Solve for x
    x = 175,952.22/456.23
  6. Step 6: Final answer
    x = 385.67

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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.