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Finding the Fourth Proportional to 620,640.40, 930,960.60 and 221,731.60

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Solution

The fourth proportional to 620,640.40, 930,960.60 and 221,731.60 is: 332,597.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,640.40 : 930,960.60 = 221,731.60 : x
  2. Step 2: Convert to fraction form
    620,640.40/930,960.60 = 221,731.60/x
  3. Step 3: Cross multiply
    620,640.40x = 930,960.60 × 221,731.60
  4. Step 4: Simplify right side
    620,640.40x = 206,423,383,374.96
  5. Step 5: Solve for x
    x = 206,423,383,374.96/620,640.40
  6. Step 6: Final answer
    x = 332,597.40

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1.5x scale

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.