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Finding the Fourth Proportional to 643.44, 969.90 and 588.80

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Solution

The fourth proportional to 643.44, 969.90 and 588.80 is: 887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.44 : 969.90 = 588.80 : x
  2. Step 2: Convert to fraction form
    643.44/969.90 = 588.80/x
  3. Step 3: Cross multiply
    643.44x = 969.90 × 588.80
  4. Step 4: Simplify right side
    643.44x = 571,077.12
  5. Step 5: Solve for x
    x = 571,077.12/643.44
  6. Step 6: Final answer
    x = 887.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.