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Finding the Fourth Proportional to 620,374.80, 930,562.20 and 221,028.60

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Solution

The fourth proportional to 620,374.80, 930,562.20 and 221,028.60 is: 331,542.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,374.80 : 930,562.20 = 221,028.60 : x
  2. Step 2: Convert to fraction form
    620,374.80/930,562.20 = 221,028.60/x
  3. Step 3: Cross multiply
    620,374.80x = 930,562.20 × 221,028.60
  4. Step 4: Simplify right side
    620,374.80x = 205,680,860,278.92
  5. Step 5: Solve for x
    x = 205,680,860,278.92/620,374.80
  6. Step 6: Final answer
    x = 331,542.90

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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.