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Finding the Fourth Proportional to 730.82, 1,007.44 and 630.79

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Solution

The fourth proportional to 730.82, 1,007.44 and 630.79 is: 869.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.82 : 1,007.44 = 630.79 : x
  2. Step 2: Convert to fraction form
    730.82/1,007.44 = 630.79/x
  3. Step 3: Cross multiply
    730.82x = 1,007.44 × 630.79
  4. Step 4: Simplify right side
    730.82x = 635,478.98
  5. Step 5: Solve for x
    x = 635,478.98/730.82
  6. Step 6: Final answer
    x = 869.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.