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Finding the Fourth Proportional to 735.53, 1,102.61 and 318.80

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Solution

The fourth proportional to 735.53, 1,102.61 and 318.80 is: 477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.53 : 1,102.61 = 318.80 : x
  2. Step 2: Convert to fraction form
    735.53/1,102.61 = 318.80/x
  3. Step 3: Cross multiply
    735.53x = 1,102.61 × 318.80
  4. Step 4: Simplify right side
    735.53x = 351,511.49
  5. Step 5: Solve for x
    x = 351,511.49/735.53
  6. Step 6: Final answer
    x = 477.90

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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.