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Finding the Fourth Proportional to 676.69, 934.26 and 489.89

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Solution

The fourth proportional to 676.69, 934.26 and 489.89 is: 676.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.69 : 934.26 = 489.89 : x
  2. Step 2: Convert to fraction form
    676.69/934.26 = 489.89/x
  3. Step 3: Cross multiply
    676.69x = 934.26 × 489.89
  4. Step 4: Simplify right side
    676.69x = 457,684.63
  5. Step 5: Solve for x
    x = 457,684.63/676.69
  6. Step 6: Final answer
    x = 676.36

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1.5x scale

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.