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Finding the Fourth Proportional to 1,218.53, 1,825.74 and 960.21

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Solution

The fourth proportional to 1,218.53, 1,825.74 and 960.21 is: 1,438.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.53 : 1,825.74 = 960.21 : x
  2. Step 2: Convert to fraction form
    1,218.53/1,825.74 = 960.21/x
  3. Step 3: Cross multiply
    1,218.53x = 1,825.74 × 960.21
  4. Step 4: Simplify right side
    1,218.53x = 1,753,093.81
  5. Step 5: Solve for x
    x = 1,753,093.81/1,218.53
  6. Step 6: Final answer
    x = 1,438.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.