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Finding the Fourth Proportional to 729.12, 1,093.72 and 266.84

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Solution

The fourth proportional to 729.12, 1,093.72 and 266.84 is: 400.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.12 : 1,093.72 = 266.84 : x
  2. Step 2: Convert to fraction form
    729.12/1,093.72 = 266.84/x
  3. Step 3: Cross multiply
    729.12x = 1,093.72 × 266.84
  4. Step 4: Simplify right side
    729.12x = 291,848.24
  5. Step 5: Solve for x
    x = 291,848.24/729.12
  6. Step 6: Final answer
    x = 400.27

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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.