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Finding the Fourth Proportional to 871.75, 1,203.06 and 522.64

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Solution

The fourth proportional to 871.75, 1,203.06 and 522.64 is: 721.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.75 : 1,203.06 = 522.64 : x
  2. Step 2: Convert to fraction form
    871.75/1,203.06 = 522.64/x
  3. Step 3: Cross multiply
    871.75x = 1,203.06 × 522.64
  4. Step 4: Simplify right side
    871.75x = 628,767.28
  5. Step 5: Solve for x
    x = 628,767.28/871.75
  6. Step 6: Final answer
    x = 721.27

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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.