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Finding the Fourth Proportional to 620,090.40, 930,265.20 and 199,408.80

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Solution

The fourth proportional to 620,090.40, 930,265.20 and 199,408.80 is: 299,154.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,090.40 : 930,265.20 = 199,408.80 : x
  2. Step 2: Convert to fraction form
    620,090.40/930,265.20 = 199,408.80/x
  3. Step 3: Cross multiply
    620,090.40x = 930,265.20 × 199,408.80
  4. Step 4: Simplify right side
    620,090.40x = 185,503,067,213.76
  5. Step 5: Solve for x
    x = 185,503,067,213.76/620,090.40
  6. Step 6: Final answer
    x = 299,154.88

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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.