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Finding the Fourth Proportional to 676.01, 920.42 and 673.85

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Solution

The fourth proportional to 676.01, 920.42 and 673.85 is: 917.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.01 : 920.42 = 673.85 : x
  2. Step 2: Convert to fraction form
    676.01/920.42 = 673.85/x
  3. Step 3: Cross multiply
    676.01x = 920.42 × 673.85
  4. Step 4: Simplify right side
    676.01x = 620,225.02
  5. Step 5: Solve for x
    x = 620,225.02/676.01
  6. Step 6: Final answer
    x = 917.48

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.