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Finding the Fourth Proportional to 620,569.30, 930,963.30 and 221,441.80

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Solution

The fourth proportional to 620,569.30, 930,963.30 and 221,441.80 is: 332,201.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,569.30 : 930,963.30 = 221,441.80 : x
  2. Step 2: Convert to fraction form
    620,569.30/930,963.30 = 221,441.80/x
  3. Step 3: Cross multiply
    620,569.30x = 930,963.30 × 221,441.80
  4. Step 4: Simplify right side
    620,569.30x = 206,154,188,885.94
  5. Step 5: Solve for x
    x = 206,154,188,885.94/620,569.30
  6. Step 6: Final answer
    x = 332,201.72

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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.