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Finding the Fourth Proportional to 1,621.24, 2,236.79 and 958.31

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Solution

The fourth proportional to 1,621.24, 2,236.79 and 958.31 is: 1,322.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.24 : 2,236.79 = 958.31 : x
  2. Step 2: Convert to fraction form
    1,621.24/2,236.79 = 958.31/x
  3. Step 3: Cross multiply
    1,621.24x = 2,236.79 × 958.31
  4. Step 4: Simplify right side
    1,621.24x = 2,143,533.43
  5. Step 5: Solve for x
    x = 2,143,533.43/1,621.24
  6. Step 6: Final answer
    x = 1,322.16

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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.