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Finding the Fourth Proportional to 874.92, 1,207.01 and 520.88

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Solution

The fourth proportional to 874.92, 1,207.01 and 520.88 is: 718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.92 : 1,207.01 = 520.88 : x
  2. Step 2: Convert to fraction form
    874.92/1,207.01 = 520.88/x
  3. Step 3: Cross multiply
    874.92x = 1,207.01 × 520.88
  4. Step 4: Simplify right side
    874.92x = 628,698.73
  5. Step 5: Solve for x
    x = 628,698.73/874.92
  6. Step 6: Final answer
    x = 718.58

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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.