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Finding the Fourth Proportional to 746.08, 1,118.21 and 609.39

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Solution

The fourth proportional to 746.08, 1,118.21 and 609.39 is: 913.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.08 : 1,118.21 = 609.39 : x
  2. Step 2: Convert to fraction form
    746.08/1,118.21 = 609.39/x
  3. Step 3: Cross multiply
    746.08x = 1,118.21 × 609.39
  4. Step 4: Simplify right side
    746.08x = 681,422.94
  5. Step 5: Solve for x
    x = 681,422.94/746.08
  6. Step 6: Final answer
    x = 913.34

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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.