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Finding the Fourth Proportional to 676.19, 932.51 and 439.89

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Solution

The fourth proportional to 676.19, 932.51 and 439.89 is: 606.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.19 : 932.51 = 439.89 : x
  2. Step 2: Convert to fraction form
    676.19/932.51 = 439.89/x
  3. Step 3: Cross multiply
    676.19x = 932.51 × 439.89
  4. Step 4: Simplify right side
    676.19x = 410,201.82
  5. Step 5: Solve for x
    x = 410,201.82/676.19
  6. Step 6: Final answer
    x = 606.64

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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.