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Finding the Fourth Proportional to 984.32, 1,356 and 673.28

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Solution

The fourth proportional to 984.32, 1,356 and 673.28 is: 927.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.32 : 1,356 = 673.28 : x
  2. Step 2: Convert to fraction form
    984.32/1,356 = 673.28/x
  3. Step 3: Cross multiply
    984.32x = 1,356 × 673.28
  4. Step 4: Simplify right side
    984.32x = 912,967.68
  5. Step 5: Solve for x
    x = 912,967.68/984.32
  6. Step 6: Final answer
    x = 927.51

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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.