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Finding the Fourth Proportional to 843.61, 1,164.12 and 489.54

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Solution

The fourth proportional to 843.61, 1,164.12 and 489.54 is: 675.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.61 : 1,164.12 = 489.54 : x
  2. Step 2: Convert to fraction form
    843.61/1,164.12 = 489.54/x
  3. Step 3: Cross multiply
    843.61x = 1,164.12 × 489.54
  4. Step 4: Simplify right side
    843.61x = 569,880.86
  5. Step 5: Solve for x
    x = 569,880.86/843.61
  6. Step 6: Final answer
    x = 675.53

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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.