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Finding the Fourth Proportional to 1,621.80, 2,238.13 and 923.22

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Solution

The fourth proportional to 1,621.80, 2,238.13 and 923.22 is: 1,274.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.80 : 2,238.13 = 923.22 : x
  2. Step 2: Convert to fraction form
    1,621.80/2,238.13 = 923.22/x
  3. Step 3: Cross multiply
    1,621.80x = 2,238.13 × 923.22
  4. Step 4: Simplify right side
    1,621.80x = 2,066,286.38
  5. Step 5: Solve for x
    x = 2,066,286.38/1,621.80
  6. Step 6: Final answer
    x = 1,274.07

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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.