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Finding the Fourth Proportional to 620,375.60, 930,344.70 and 221,029.40

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Solution

The fourth proportional to 620,375.60, 930,344.70 and 221,029.40 is: 331,466.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,375.60 : 930,344.70 = 221,029.40 : x
  2. Step 2: Convert to fraction form
    620,375.60/930,344.70 = 221,029.40/x
  3. Step 3: Cross multiply
    620,375.60x = 930,344.70 × 221,029.40
  4. Step 4: Simplify right side
    620,375.60x = 205,633,530,834.18
  5. Step 5: Solve for x
    x = 205,633,530,834.18/620,375.60
  6. Step 6: Final answer
    x = 331,466.18

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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.