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Finding the Fourth Proportional to 1,621.92, 2,238.24 and 923.28

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Solution

The fourth proportional to 1,621.92, 2,238.24 and 923.28 is: 1,274.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.92 : 2,238.24 = 923.28 : x
  2. Step 2: Convert to fraction form
    1,621.92/2,238.24 = 923.28/x
  3. Step 3: Cross multiply
    1,621.92x = 2,238.24 × 923.28
  4. Step 4: Simplify right side
    1,621.92x = 2,066,522.23
  5. Step 5: Solve for x
    x = 2,066,522.23/1,621.92
  6. Step 6: Final answer
    x = 1,274.12

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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.