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Finding the Fourth Proportional to 673.69, 931.36 and 667.54

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Solution

The fourth proportional to 673.69, 931.36 and 667.54 is: 922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.69 : 931.36 = 667.54 : x
  2. Step 2: Convert to fraction form
    673.69/931.36 = 667.54/x
  3. Step 3: Cross multiply
    673.69x = 931.36 × 667.54
  4. Step 4: Simplify right side
    673.69x = 621,712.06
  5. Step 5: Solve for x
    x = 621,712.06/673.69
  6. Step 6: Final answer
    x = 922.85

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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.