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Finding the Fourth Proportional to 919.96, 1,269.97 and 605.24

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Solution

The fourth proportional to 919.96, 1,269.97 and 605.24 is: 835.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.96 : 1,269.97 = 605.24 : x
  2. Step 2: Convert to fraction form
    919.96/1,269.97 = 605.24/x
  3. Step 3: Cross multiply
    919.96x = 1,269.97 × 605.24
  4. Step 4: Simplify right side
    919.96x = 768,637.28
  5. Step 5: Solve for x
    x = 768,637.28/919.96
  6. Step 6: Final answer
    x = 835.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.