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Finding the Fourth Proportional to 730.62, 1,090.26 and 684.05

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Solution

The fourth proportional to 730.62, 1,090.26 and 684.05 is: 1,020.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.62 : 1,090.26 = 684.05 : x
  2. Step 2: Convert to fraction form
    730.62/1,090.26 = 684.05/x
  3. Step 3: Cross multiply
    730.62x = 1,090.26 × 684.05
  4. Step 4: Simplify right side
    730.62x = 745,786.90
  5. Step 5: Solve for x
    x = 745,786.90/730.62
  6. Step 6: Final answer
    x = 1,020.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.