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Finding the Fourth Proportional to 919.48, 1,268.42 and 541.11

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Solution

The fourth proportional to 919.48, 1,268.42 and 541.11 is: 746.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.48 : 1,268.42 = 541.11 : x
  2. Step 2: Convert to fraction form
    919.48/1,268.42 = 541.11/x
  3. Step 3: Cross multiply
    919.48x = 1,268.42 × 541.11
  4. Step 4: Simplify right side
    919.48x = 686,354.75
  5. Step 5: Solve for x
    x = 686,354.75/919.48
  6. Step 6: Final answer
    x = 746.46

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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.