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Finding the Fourth Proportional to 739.77, 1,109.50 and 349.60

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Solution

The fourth proportional to 739.77, 1,109.50 and 349.60 is: 524.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.77 : 1,109.50 = 349.60 : x
  2. Step 2: Convert to fraction form
    739.77/1,109.50 = 349.60/x
  3. Step 3: Cross multiply
    739.77x = 1,109.50 × 349.60
  4. Step 4: Simplify right side
    739.77x = 387,879.45
  5. Step 5: Solve for x
    x = 387,879.45/739.77
  6. Step 6: Final answer
    x = 524.33

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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.