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Finding the Fourth Proportional to 735.49, 1,103.90 and 345.72

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Solution

The fourth proportional to 735.49, 1,103.90 and 345.72 is: 518.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.49 : 1,103.90 = 345.72 : x
  2. Step 2: Convert to fraction form
    735.49/1,103.90 = 345.72/x
  3. Step 3: Cross multiply
    735.49x = 1,103.90 × 345.72
  4. Step 4: Simplify right side
    735.49x = 381,640.31
  5. Step 5: Solve for x
    x = 381,640.31/735.49
  6. Step 6: Final answer
    x = 518.89

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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.