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Finding the Fourth Proportional to 1,621.88, 2,238.19 and 923.25

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Solution

The fourth proportional to 1,621.88, 2,238.19 and 923.25 is: 1,274.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.88 : 2,238.19 = 923.25 : x
  2. Step 2: Convert to fraction form
    1,621.88/2,238.19 = 923.25/x
  3. Step 3: Cross multiply
    1,621.88x = 2,238.19 × 923.25
  4. Step 4: Simplify right side
    1,621.88x = 2,066,406.61
  5. Step 5: Solve for x
    x = 2,066,406.61/1,621.88
  6. Step 6: Final answer
    x = 1,274.09

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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.