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Finding the Fourth Proportional to 620,140.60, 929,992.20 and 220,794.40

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Solution

The fourth proportional to 620,140.60, 929,992.20 and 220,794.40 is: 331,113.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,140.60 : 929,992.20 = 220,794.40 : x
  2. Step 2: Convert to fraction form
    620,140.60/929,992.20 = 220,794.40/x
  3. Step 3: Cross multiply
    620,140.60x = 929,992.20 × 220,794.40
  4. Step 4: Simplify right side
    620,140.60x = 205,337,069,803.68
  5. Step 5: Solve for x
    x = 205,337,069,803.68/620,140.60
  6. Step 6: Final answer
    x = 331,113.73

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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.