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Finding the Fourth Proportional to 783.89, 1,081.80 and 452.33

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Solution

The fourth proportional to 783.89, 1,081.80 and 452.33 is: 624.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.89 : 1,081.80 = 452.33 : x
  2. Step 2: Convert to fraction form
    783.89/1,081.80 = 452.33/x
  3. Step 3: Cross multiply
    783.89x = 1,081.80 × 452.33
  4. Step 4: Simplify right side
    783.89x = 489,330.59
  5. Step 5: Solve for x
    x = 489,330.59/783.89
  6. Step 6: Final answer
    x = 624.23

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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.