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Finding the Fourth Proportional to 636.04, 877.74 and 387.32

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Solution

The fourth proportional to 636.04, 877.74 and 387.32 is: 534.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.04 : 877.74 = 387.32 : x
  2. Step 2: Convert to fraction form
    636.04/877.74 = 387.32/x
  3. Step 3: Cross multiply
    636.04x = 877.74 × 387.32
  4. Step 4: Simplify right side
    636.04x = 339,966.26
  5. Step 5: Solve for x
    x = 339,966.26/636.04
  6. Step 6: Final answer
    x = 534.50

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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.