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Finding the Fourth Proportional to 676.44, 931.07 and 479.61

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Solution

The fourth proportional to 676.44, 931.07 and 479.61 is: 660.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.44 : 931.07 = 479.61 : x
  2. Step 2: Convert to fraction form
    676.44/931.07 = 479.61/x
  3. Step 3: Cross multiply
    676.44x = 931.07 × 479.61
  4. Step 4: Simplify right side
    676.44x = 446,545.83
  5. Step 5: Solve for x
    x = 446,545.83/676.44
  6. Step 6: Final answer
    x = 660.15

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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.