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Finding the Fourth Proportional to 636.02, 877.43 and 387.29

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Solution

The fourth proportional to 636.02, 877.43 and 387.29 is: 534.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.02 : 877.43 = 387.29 : x
  2. Step 2: Convert to fraction form
    636.02/877.43 = 387.29/x
  3. Step 3: Cross multiply
    636.02x = 877.43 × 387.29
  4. Step 4: Simplify right side
    636.02x = 339,823.03
  5. Step 5: Solve for x
    x = 339,823.03/636.02
  6. Step 6: Final answer
    x = 534.30

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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.