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Finding the Fourth Proportional to 676.19, 930.73 and 479.36

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Solution

The fourth proportional to 676.19, 930.73 and 479.36 is: 659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.19 : 930.73 = 479.36 : x
  2. Step 2: Convert to fraction form
    676.19/930.73 = 479.36/x
  3. Step 3: Cross multiply
    676.19x = 930.73 × 479.36
  4. Step 4: Simplify right side
    676.19x = 446,148.88
  5. Step 5: Solve for x
    x = 446,148.88/676.19
  6. Step 6: Final answer
    x = 659.80

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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.