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Finding the Fourth Proportional to 982.50, 1,355.85 and 568.50

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Solution

The fourth proportional to 982.50, 1,355.85 and 568.50 is: 784.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.50 : 1,355.85 = 568.50 : x
  2. Step 2: Convert to fraction form
    982.50/1,355.85 = 568.50/x
  3. Step 3: Cross multiply
    982.50x = 1,355.85 × 568.50
  4. Step 4: Simplify right side
    982.50x = 770,800.73
  5. Step 5: Solve for x
    x = 770,800.73/982.50
  6. Step 6: Final answer
    x = 784.53

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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.