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Finding the Fourth Proportional to 940.22, 1,408.49 and 614.60

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Solution

The fourth proportional to 940.22, 1,408.49 and 614.60 is: 920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.22 : 1,408.49 = 614.60 : x
  2. Step 2: Convert to fraction form
    940.22/1,408.49 = 614.60/x
  3. Step 3: Cross multiply
    940.22x = 1,408.49 × 614.60
  4. Step 4: Simplify right side
    940.22x = 865,652.45
  5. Step 5: Solve for x
    x = 865,652.45/940.22
  6. Step 6: Final answer
    x = 920.70

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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.