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Finding the Fourth Proportional to 671.92, 1,008.07 and 607.66

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Solution

The fourth proportional to 671.92, 1,008.07 and 607.66 is: 911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.92 : 1,008.07 = 607.66 : x
  2. Step 2: Convert to fraction form
    671.92/1,008.07 = 607.66/x
  3. Step 3: Cross multiply
    671.92x = 1,008.07 × 607.66
  4. Step 4: Simplify right side
    671.92x = 612,563.82
  5. Step 5: Solve for x
    x = 612,563.82/671.92
  6. Step 6: Final answer
    x = 911.66

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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.