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Finding the Fourth Proportional to 676.32, 1,015.34 and 433.92

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Solution

The fourth proportional to 676.32, 1,015.34 and 433.92 is: 651.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.32 : 1,015.34 = 433.92 : x
  2. Step 2: Convert to fraction form
    676.32/1,015.34 = 433.92/x
  3. Step 3: Cross multiply
    676.32x = 1,015.34 × 433.92
  4. Step 4: Simplify right side
    676.32x = 440,576.33
  5. Step 5: Solve for x
    x = 440,576.33/676.32
  6. Step 6: Final answer
    x = 651.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.