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Finding the Fourth Proportional to 620,174.60, 930,043.20 and 220,828.40

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Solution

The fourth proportional to 620,174.60, 930,043.20 and 220,828.40 is: 331,164.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,174.60 : 930,043.20 = 220,828.40 : x
  2. Step 2: Convert to fraction form
    620,174.60/930,043.20 = 220,828.40/x
  3. Step 3: Cross multiply
    620,174.60x = 930,043.20 × 220,828.40
  4. Step 4: Simplify right side
    620,174.60x = 205,379,951,786.88
  5. Step 5: Solve for x
    x = 205,379,951,786.88/620,174.60
  6. Step 6: Final answer
    x = 331,164.73

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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.