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Finding the Fourth Proportional to 620,814.60, 931,003.20 and 221,468.40

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Solution

The fourth proportional to 620,814.60, 931,003.20 and 221,468.40 is: 332,124.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,814.60 : 931,003.20 = 221,468.40 : x
  2. Step 2: Convert to fraction form
    620,814.60/931,003.20 = 221,468.40/x
  3. Step 3: Cross multiply
    620,814.60x = 931,003.20 × 221,468.40
  4. Step 4: Simplify right side
    620,814.60x = 206,187,789,098.88
  5. Step 5: Solve for x
    x = 206,187,789,098.88/620,814.60
  6. Step 6: Final answer
    x = 332,124.58

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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.