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Finding the Fourth Proportional to 668.48, 921.92 and 435.68

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Solution

The fourth proportional to 668.48, 921.92 and 435.68 is: 600.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.48 : 921.92 = 435.68 : x
  2. Step 2: Convert to fraction form
    668.48/921.92 = 435.68/x
  3. Step 3: Cross multiply
    668.48x = 921.92 × 435.68
  4. Step 4: Simplify right side
    668.48x = 401,662.11
  5. Step 5: Solve for x
    x = 401,662.11/668.48
  6. Step 6: Final answer
    x = 600.86

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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.