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Finding the Fourth Proportional to 874.58, 1,205.62 and 579.33

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Solution

The fourth proportional to 874.58, 1,205.62 and 579.33 is: 798.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.58 : 1,205.62 = 579.33 : x
  2. Step 2: Convert to fraction form
    874.58/1,205.62 = 579.33/x
  3. Step 3: Cross multiply
    874.58x = 1,205.62 × 579.33
  4. Step 4: Simplify right side
    874.58x = 698,450.39
  5. Step 5: Solve for x
    x = 698,450.39/874.58
  6. Step 6: Final answer
    x = 798.62

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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.