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Finding the Fourth Proportional to 751.95, 1,125.19 and 620.73

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Solution

The fourth proportional to 751.95, 1,125.19 and 620.73 is: 928.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.95 : 1,125.19 = 620.73 : x
  2. Step 2: Convert to fraction form
    751.95/1,125.19 = 620.73/x
  3. Step 3: Cross multiply
    751.95x = 1,125.19 × 620.73
  4. Step 4: Simplify right side
    751.95x = 698,432.25
  5. Step 5: Solve for x
    x = 698,432.25/751.95
  6. Step 6: Final answer
    x = 928.83

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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.