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Finding the Fourth Proportional to 643.08, 962.82 and 488.28

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Solution

The fourth proportional to 643.08, 962.82 and 488.28 is: 731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.08 : 962.82 = 488.28 : x
  2. Step 2: Convert to fraction form
    643.08/962.82 = 488.28/x
  3. Step 3: Cross multiply
    643.08x = 962.82 × 488.28
  4. Step 4: Simplify right side
    643.08x = 470,125.75
  5. Step 5: Solve for x
    x = 470,125.75/643.08
  6. Step 6: Final answer
    x = 731.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.