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Finding the Fourth Proportional to 1,416.64, 1,954.24 and 919.56

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Solution

The fourth proportional to 1,416.64, 1,954.24 and 919.56 is: 1,268.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.64 : 1,954.24 = 919.56 : x
  2. Step 2: Convert to fraction form
    1,416.64/1,954.24 = 919.56/x
  3. Step 3: Cross multiply
    1,416.64x = 1,954.24 × 919.56
  4. Step 4: Simplify right side
    1,416.64x = 1,797,040.93
  5. Step 5: Solve for x
    x = 1,797,040.93/1,416.64
  6. Step 6: Final answer
    x = 1,268.52

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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.