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Finding the Fourth Proportional to 620,748.10, 930,903.45 and 221,401.90

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Solution

The fourth proportional to 620,748.10, 930,903.45 and 221,401.90 is: 332,024.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,748.10 : 930,903.45 = 221,401.90 : x
  2. Step 2: Convert to fraction form
    620,748.10/930,903.45 = 221,401.90/x
  3. Step 3: Cross multiply
    620,748.10x = 930,903.45 × 221,401.90
  4. Step 4: Simplify right side
    620,748.10x = 206,103,792,546.56
  5. Step 5: Solve for x
    x = 206,103,792,546.56/620,748.10
  6. Step 6: Final answer
    x = 332,024.85

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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.