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Finding the Fourth Proportional to 874.91, 1,208.41 and 579.67

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Solution

The fourth proportional to 874.91, 1,208.41 and 579.67 is: 800.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.91 : 1,208.41 = 579.67 : x
  2. Step 2: Convert to fraction form
    874.91/1,208.41 = 579.67/x
  3. Step 3: Cross multiply
    874.91x = 1,208.41 × 579.67
  4. Step 4: Simplify right side
    874.91x = 700,479.02
  5. Step 5: Solve for x
    x = 700,479.02/874.91
  6. Step 6: Final answer
    x = 800.63

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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.