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Finding the Fourth Proportional to 919.33, 1,268.79 and 526.27

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Solution

The fourth proportional to 919.33, 1,268.79 and 526.27 is: 726.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.33 : 1,268.79 = 526.27 : x
  2. Step 2: Convert to fraction form
    919.33/1,268.79 = 526.27/x
  3. Step 3: Cross multiply
    919.33x = 1,268.79 × 526.27
  4. Step 4: Simplify right side
    919.33x = 667,726.11
  5. Step 5: Solve for x
    x = 667,726.11/919.33
  6. Step 6: Final answer
    x = 726.32

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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.