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Finding the Fourth Proportional to 629.04, 871.76 and 620.24

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Solution

The fourth proportional to 629.04, 871.76 and 620.24 is: 859.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.04 : 871.76 = 620.24 : x
  2. Step 2: Convert to fraction form
    629.04/871.76 = 620.24/x
  3. Step 3: Cross multiply
    629.04x = 871.76 × 620.24
  4. Step 4: Simplify right side
    629.04x = 540,694.13
  5. Step 5: Solve for x
    x = 540,694.13/629.04
  6. Step 6: Final answer
    x = 859.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.