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Finding the Fourth Proportional to 620,161.60, 930,023.70 and 220,815.40

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Solution

The fourth proportional to 620,161.60, 930,023.70 and 220,815.40 is: 331,145.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,161.60 : 930,023.70 = 220,815.40 : x
  2. Step 2: Convert to fraction form
    620,161.60/930,023.70 = 220,815.40/x
  3. Step 3: Cross multiply
    620,161.60x = 930,023.70 × 220,815.40
  4. Step 4: Simplify right side
    620,161.60x = 205,363,555,324.98
  5. Step 5: Solve for x
    x = 205,363,555,324.98/620,161.60
  6. Step 6: Final answer
    x = 331,145.23

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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.