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Finding the Fourth Proportional to 668.03, 921.46 and 431.89

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Solution

The fourth proportional to 668.03, 921.46 and 431.89 is: 595.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.03 : 921.46 = 431.89 : x
  2. Step 2: Convert to fraction form
    668.03/921.46 = 431.89/x
  3. Step 3: Cross multiply
    668.03x = 921.46 × 431.89
  4. Step 4: Simplify right side
    668.03x = 397,969.36
  5. Step 5: Solve for x
    x = 397,969.36/668.03
  6. Step 6: Final answer
    x = 595.74

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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.