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Finding the Fourth Proportional to 768.80, 1,059.36 and 593.60

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Solution

The fourth proportional to 768.80, 1,059.36 and 593.60 is: 817.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.80 : 1,059.36 = 593.60 : x
  2. Step 2: Convert to fraction form
    768.80/1,059.36 = 593.60/x
  3. Step 3: Cross multiply
    768.80x = 1,059.36 × 593.60
  4. Step 4: Simplify right side
    768.80x = 628,836.10
  5. Step 5: Solve for x
    x = 628,836.10/768.80
  6. Step 6: Final answer
    x = 817.94

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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.