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Finding the Fourth Proportional to 728.43, 1,004.74 and 466.33

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Solution

The fourth proportional to 728.43, 1,004.74 and 466.33 is: 643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.43 : 1,004.74 = 466.33 : x
  2. Step 2: Convert to fraction form
    728.43/1,004.74 = 466.33/x
  3. Step 3: Cross multiply
    728.43x = 1,004.74 × 466.33
  4. Step 4: Simplify right side
    728.43x = 468,540.49
  5. Step 5: Solve for x
    x = 468,540.49/728.43
  6. Step 6: Final answer
    x = 643.22

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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.