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Finding the Fourth Proportional to 671.01, 1,007.66 and 636.45

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Solution

The fourth proportional to 671.01, 1,007.66 and 636.45 is: 955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.01 : 1,007.66 = 636.45 : x
  2. Step 2: Convert to fraction form
    671.01/1,007.66 = 636.45/x
  3. Step 3: Cross multiply
    671.01x = 1,007.66 × 636.45
  4. Step 4: Simplify right side
    671.01x = 641,325.21
  5. Step 5: Solve for x
    x = 641,325.21/671.01
  6. Step 6: Final answer
    x = 955.76

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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.