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Finding the Fourth Proportional to 635.72, 878.10 and 488.84

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Solution

The fourth proportional to 635.72, 878.10 and 488.84 is: 675.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.72 : 878.10 = 488.84 : x
  2. Step 2: Convert to fraction form
    635.72/878.10 = 488.84/x
  3. Step 3: Cross multiply
    635.72x = 878.10 × 488.84
  4. Step 4: Simplify right side
    635.72x = 429,250.40
  5. Step 5: Solve for x
    x = 429,250.40/635.72
  6. Step 6: Final answer
    x = 675.22

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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.