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Finding the Fourth Proportional to 668.02, 921.41 and 435.46

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Solution

The fourth proportional to 668.02, 921.41 and 435.46 is: 600.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.02 : 921.41 = 435.46 : x
  2. Step 2: Convert to fraction form
    668.02/921.41 = 435.46/x
  3. Step 3: Cross multiply
    668.02x = 921.41 × 435.46
  4. Step 4: Simplify right side
    668.02x = 401,237.20
  5. Step 5: Solve for x
    x = 401,237.20/668.02
  6. Step 6: Final answer
    x = 600.64

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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.