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Finding the Fourth Proportional to 551,436.20, 827,640.30 and 326,515.40

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Solution

The fourth proportional to 551,436.20, 827,640.30 and 326,515.40 is: 490,060.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,436.20 : 827,640.30 = 326,515.40 : x
  2. Step 2: Convert to fraction form
    551,436.20/827,640.30 = 326,515.40/x
  3. Step 3: Cross multiply
    551,436.20x = 827,640.30 × 326,515.40
  4. Step 4: Simplify right side
    551,436.20x = 270,237,303,610.62
  5. Step 5: Solve for x
    x = 270,237,303,610.62/551,436.20
  6. Step 6: Final answer
    x = 490,060.87

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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.