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Finding the Fourth Proportional to 674.55, 1,011.83 and 512.55

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Solution

The fourth proportional to 674.55, 1,011.83 and 512.55 is: 768.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.55 : 1,011.83 = 512.55 : x
  2. Step 2: Convert to fraction form
    674.55/1,011.83 = 512.55/x
  3. Step 3: Cross multiply
    674.55x = 1,011.83 × 512.55
  4. Step 4: Simplify right side
    674.55x = 518,610.90
  5. Step 5: Solve for x
    x = 518,610.90/674.55
  6. Step 6: Final answer
    x = 768.83

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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.