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Finding the Fourth Proportional to 671.26, 1,005.26 and 465.25

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Solution

The fourth proportional to 671.26, 1,005.26 and 465.25 is: 696.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.26 : 1,005.26 = 465.25 : x
  2. Step 2: Convert to fraction form
    671.26/1,005.26 = 465.25/x
  3. Step 3: Cross multiply
    671.26x = 1,005.26 × 465.25
  4. Step 4: Simplify right side
    671.26x = 467,697.22
  5. Step 5: Solve for x
    x = 467,697.22/671.26
  6. Step 6: Final answer
    x = 696.75

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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.