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Finding the Fourth Proportional to 662.63, 914.42 and 386.63

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Solution

The fourth proportional to 662.63, 914.42 and 386.63 is: 533.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.63 : 914.42 = 386.63 : x
  2. Step 2: Convert to fraction form
    662.63/914.42 = 386.63/x
  3. Step 3: Cross multiply
    662.63x = 914.42 × 386.63
  4. Step 4: Simplify right side
    662.63x = 353,542.20
  5. Step 5: Solve for x
    x = 353,542.20/662.63
  6. Step 6: Final answer
    x = 533.54

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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.