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Finding the Fourth Proportional to 874.58, 1,206.24 and 579.74

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Solution

The fourth proportional to 874.58, 1,206.24 and 579.74 is: 799.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.58 : 1,206.24 = 579.74 : x
  2. Step 2: Convert to fraction form
    874.58/1,206.24 = 579.74/x
  3. Step 3: Cross multiply
    874.58x = 1,206.24 × 579.74
  4. Step 4: Simplify right side
    874.58x = 699,305.58
  5. Step 5: Solve for x
    x = 699,305.58/874.58
  6. Step 6: Final answer
    x = 799.59

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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.