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Finding the Fourth Proportional to 636.46, 877.68 and 479.46

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Solution

The fourth proportional to 636.46, 877.68 and 479.46 is: 661.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.46 : 877.68 = 479.46 : x
  2. Step 2: Convert to fraction form
    636.46/877.68 = 479.46/x
  3. Step 3: Cross multiply
    636.46x = 877.68 × 479.46
  4. Step 4: Simplify right side
    636.46x = 420,812.45
  5. Step 5: Solve for x
    x = 420,812.45/636.46
  6. Step 6: Final answer
    x = 661.18

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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.