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Finding the Fourth Proportional to 636, 876.04 and 488.40

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Solution

The fourth proportional to 636, 876.04 and 488.40 is: 672.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    636 : 876.04 = 488.40 : x
  2. Step 2: Convert to fraction form
    636/876.04 = 488.40/x
  3. Step 3: Cross multiply
    636x = 876.04 × 488.40
  4. Step 4: Simplify right side
    636x = 427,857.94
  5. Step 5: Solve for x
    x = 427,857.94/636
  6. Step 6: Final answer
    x = 672.73

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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.