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Finding the Fourth Proportional to 768.14, 1,152.75 and 670.94

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Solution

The fourth proportional to 768.14, 1,152.75 and 670.94 is: 1,006.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.14 : 1,152.75 = 670.94 : x
  2. Step 2: Convert to fraction form
    768.14/1,152.75 = 670.94/x
  3. Step 3: Cross multiply
    768.14x = 1,152.75 × 670.94
  4. Step 4: Simplify right side
    768.14x = 773,426.09
  5. Step 5: Solve for x
    x = 773,426.09/768.14
  6. Step 6: Final answer
    x = 1,006.88

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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.