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Finding the Fourth Proportional to 653.97, 980.80 and 243.30

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Solution

The fourth proportional to 653.97, 980.80 and 243.30 is: 364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.97 : 980.80 = 243.30 : x
  2. Step 2: Convert to fraction form
    653.97/980.80 = 243.30/x
  3. Step 3: Cross multiply
    653.97x = 980.80 × 243.30
  4. Step 4: Simplify right side
    653.97x = 238,629.25
  5. Step 5: Solve for x
    x = 238,629.25/653.97
  6. Step 6: Final answer
    x = 364.89

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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.