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Finding the Fourth Proportional to 620,306.40, 930,589.20 and 199,624.80

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Solution

The fourth proportional to 620,306.40, 930,589.20 and 199,624.80 is: 299,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,306.40 : 930,589.20 = 199,624.80 : x
  2. Step 2: Convert to fraction form
    620,306.40/930,589.20 = 199,624.80/x
  3. Step 3: Cross multiply
    620,306.40x = 930,589.20 × 199,624.80
  4. Step 4: Simplify right side
    620,306.40x = 185,768,682,932.16
  5. Step 5: Solve for x
    x = 185,768,682,932.16/620,306.40
  6. Step 6: Final answer
    x = 299,478.91

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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.