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Finding the Fourth Proportional to 620,620.20, 930,930.30 and 408,043.80

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Solution

The fourth proportional to 620,620.20, 930,930.30 and 408,043.80 is: 612,065.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,620.20 : 930,930.30 = 408,043.80 : x
  2. Step 2: Convert to fraction form
    620,620.20/930,930.30 = 408,043.80/x
  3. Step 3: Cross multiply
    620,620.20x = 930,930.30 × 408,043.80
  4. Step 4: Simplify right side
    620,620.20x = 379,860,337,147.14
  5. Step 5: Solve for x
    x = 379,860,337,147.14/620,620.20
  6. Step 6: Final answer
    x = 612,065.70

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1.5x scale

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.