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Finding the Fourth Proportional to 620,286.40, 930,559.20 and 199,604.80

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Solution

The fourth proportional to 620,286.40, 930,559.20 and 199,604.80 is: 299,448.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,286.40 : 930,559.20 = 199,604.80 : x
  2. Step 2: Convert to fraction form
    620,286.40/930,559.20 = 199,604.80/x
  3. Step 3: Cross multiply
    620,286.40x = 930,559.20 × 199,604.80
  4. Step 4: Simplify right side
    620,286.40x = 185,744,083,004.16
  5. Step 5: Solve for x
    x = 185,744,083,004.16/620,286.40
  6. Step 6: Final answer
    x = 299,448.90

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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.