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Finding the Fourth Proportional to 729.18, 1,094.46 and 485.88

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Solution

The fourth proportional to 729.18, 1,094.46 and 485.88 is: 729.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.18 : 1,094.46 = 485.88 : x
  2. Step 2: Convert to fraction form
    729.18/1,094.46 = 485.88/x
  3. Step 3: Cross multiply
    729.18x = 1,094.46 × 485.88
  4. Step 4: Simplify right side
    729.18x = 531,776.22
  5. Step 5: Solve for x
    x = 531,776.22/729.18
  6. Step 6: Final answer
    x = 729.28

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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.