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Finding the Fourth Proportional to 503,974.80, 755,087.40 and 326,390.40

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Solution

The fourth proportional to 503,974.80, 755,087.40 and 326,390.40 is: 489,019.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,974.80 : 755,087.40 = 326,390.40 : x
  2. Step 2: Convert to fraction form
    503,974.80/755,087.40 = 326,390.40/x
  3. Step 3: Cross multiply
    503,974.80x = 755,087.40 × 326,390.40
  4. Step 4: Simplify right side
    503,974.80x = 246,453,278,520.96
  5. Step 5: Solve for x
    x = 246,453,278,520.96/503,974.80
  6. Step 6: Final answer
    x = 489,019.05

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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.