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Finding the Fourth Proportional to 728.13, 1,004.79 and 433.41

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Solution

The fourth proportional to 728.13, 1,004.79 and 433.41 is: 598.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.13 : 1,004.79 = 433.41 : x
  2. Step 2: Convert to fraction form
    728.13/1,004.79 = 433.41/x
  3. Step 3: Cross multiply
    728.13x = 1,004.79 × 433.41
  4. Step 4: Simplify right side
    728.13x = 435,486.03
  5. Step 5: Solve for x
    x = 435,486.03/728.13
  6. Step 6: Final answer
    x = 598.09

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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.