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Finding the Fourth Proportional to 636.42, 872.64 and 573.99

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Solution

The fourth proportional to 636.42, 872.64 and 573.99 is: 787.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.42 : 872.64 = 573.99 : x
  2. Step 2: Convert to fraction form
    636.42/872.64 = 573.99/x
  3. Step 3: Cross multiply
    636.42x = 872.64 × 573.99
  4. Step 4: Simplify right side
    636.42x = 500,883.36
  5. Step 5: Solve for x
    x = 500,883.36/636.42
  6. Step 6: Final answer
    x = 787.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.