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Finding the Fourth Proportional to 547,771.70, 821,657.55 and 387,413.30

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Solution

The fourth proportional to 547,771.70, 821,657.55 and 387,413.30 is: 581,119.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,771.70 : 821,657.55 = 387,413.30 : x
  2. Step 2: Convert to fraction form
    547,771.70/821,657.55 = 387,413.30/x
  3. Step 3: Cross multiply
    547,771.70x = 821,657.55 × 387,413.30
  4. Step 4: Simplify right side
    547,771.70x = 318,321,062,915.42
  5. Step 5: Solve for x
    x = 318,321,062,915.42/547,771.70
  6. Step 6: Final answer
    x = 581,119.95

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Similar ratio
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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.