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Finding the Fourth Proportional to 783.85, 1,081.95 and 452.49

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Solution

The fourth proportional to 783.85, 1,081.95 and 452.49 is: 624.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.85 : 1,081.95 = 452.49 : x
  2. Step 2: Convert to fraction form
    783.85/1,081.95 = 452.49/x
  3. Step 3: Cross multiply
    783.85x = 1,081.95 × 452.49
  4. Step 4: Simplify right side
    783.85x = 489,571.56
  5. Step 5: Solve for x
    x = 489,571.56/783.85
  6. Step 6: Final answer
    x = 624.57

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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.