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Finding the Fourth Proportional to 636.09, 877.60 and 356.28

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Solution

The fourth proportional to 636.09, 877.60 and 356.28 is: 491.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.09 : 877.60 = 356.28 : x
  2. Step 2: Convert to fraction form
    636.09/877.60 = 356.28/x
  3. Step 3: Cross multiply
    636.09x = 877.60 × 356.28
  4. Step 4: Simplify right side
    636.09x = 312,666.05
  5. Step 5: Solve for x
    x = 312,666.05/636.09
  6. Step 6: Final answer
    x = 491.55

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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.