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Finding the Fourth Proportional to 673.69, 1,010.65 and 327.64

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Solution

The fourth proportional to 673.69, 1,010.65 and 327.64 is: 491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.69 : 1,010.65 = 327.64 : x
  2. Step 2: Convert to fraction form
    673.69/1,010.65 = 327.64/x
  3. Step 3: Cross multiply
    673.69x = 1,010.65 × 327.64
  4. Step 4: Simplify right side
    673.69x = 331,129.37
  5. Step 5: Solve for x
    x = 331,129.37/673.69
  6. Step 6: Final answer
    x = 491.52

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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.