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Finding the Fourth Proportional to 751.38, 1,125.63 and 519.96

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Solution

The fourth proportional to 751.38, 1,125.63 and 519.96 is: 778.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.38 : 1,125.63 = 519.96 : x
  2. Step 2: Convert to fraction form
    751.38/1,125.63 = 519.96/x
  3. Step 3: Cross multiply
    751.38x = 1,125.63 × 519.96
  4. Step 4: Simplify right side
    751.38x = 585,282.57
  5. Step 5: Solve for x
    x = 585,282.57/751.38
  6. Step 6: Final answer
    x = 778.94

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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.