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Finding the Fourth Proportional to 1,355.48, 2,033.80 and 739.64

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Solution

The fourth proportional to 1,355.48, 2,033.80 and 739.64 is: 1,109.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.48 : 2,033.80 = 739.64 : x
  2. Step 2: Convert to fraction form
    1,355.48/2,033.80 = 739.64/x
  3. Step 3: Cross multiply
    1,355.48x = 2,033.80 × 739.64
  4. Step 4: Simplify right side
    1,355.48x = 1,504,279.83
  5. Step 5: Solve for x
    x = 1,504,279.83/1,355.48
  6. Step 6: Final answer
    x = 1,109.78

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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.