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Finding the Fourth Proportional to 919.25, 1,268.41 and 526.30

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Solution

The fourth proportional to 919.25, 1,268.41 and 526.30 is: 726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.25 : 1,268.41 = 526.30 : x
  2. Step 2: Convert to fraction form
    919.25/1,268.41 = 526.30/x
  3. Step 3: Cross multiply
    919.25x = 1,268.41 × 526.30
  4. Step 4: Simplify right side
    919.25x = 667,560.68
  5. Step 5: Solve for x
    x = 667,560.68/919.25
  6. Step 6: Final answer
    x = 726.20

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1.5x scale

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.