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Finding the Fourth Proportional to 620,771.60, 930,938.70 and 221,425.40

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Solution

The fourth proportional to 620,771.60, 930,938.70 and 221,425.40 is: 332,060.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,771.60 : 930,938.70 = 221,425.40 : x
  2. Step 2: Convert to fraction form
    620,771.60/930,938.70 = 221,425.40/x
  3. Step 3: Cross multiply
    620,771.60x = 930,938.70 × 221,425.40
  4. Step 4: Simplify right side
    620,771.60x = 206,133,474,022.98
  5. Step 5: Solve for x
    x = 206,133,474,022.98/620,771.60
  6. Step 6: Final answer
    x = 332,060.09

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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.