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Finding the Fourth Proportional to 728.94, 1,091.34 and 484.98

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Solution

The fourth proportional to 728.94, 1,091.34 and 484.98 is: 726.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.94 : 1,091.34 = 484.98 : x
  2. Step 2: Convert to fraction form
    728.94/1,091.34 = 484.98/x
  3. Step 3: Cross multiply
    728.94x = 1,091.34 × 484.98
  4. Step 4: Simplify right side
    728.94x = 529,278.07
  5. Step 5: Solve for x
    x = 529,278.07/728.94
  6. Step 6: Final answer
    x = 726.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.