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Finding the Fourth Proportional to 919.42, 1,268.74 and 526.38

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Solution

The fourth proportional to 919.42, 1,268.74 and 526.38 is: 726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.42 : 1,268.74 = 526.38 : x
  2. Step 2: Convert to fraction form
    919.42/1,268.74 = 526.38/x
  3. Step 3: Cross multiply
    919.42x = 1,268.74 × 526.38
  4. Step 4: Simplify right side
    919.42x = 667,839.36
  5. Step 5: Solve for x
    x = 667,839.36/919.42
  6. Step 6: Final answer
    x = 726.37

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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.