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Finding the Fourth Proportional to 636.04, 877.36 and 387.16

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Solution

The fourth proportional to 636.04, 877.36 and 387.16 is: 534.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.04 : 877.36 = 387.16 : x
  2. Step 2: Convert to fraction form
    636.04/877.36 = 387.16/x
  3. Step 3: Cross multiply
    636.04x = 877.36 × 387.16
  4. Step 4: Simplify right side
    636.04x = 339,678.70
  5. Step 5: Solve for x
    x = 339,678.70/636.04
  6. Step 6: Final answer
    x = 534.05

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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.