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Finding the Fourth Proportional to 620,169.20, 930,257.42 and 220,825.40

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Solution

The fourth proportional to 620,169.20, 930,257.42 and 220,825.40 is: 331,239.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,169.20 : 930,257.42 = 220,825.40 : x
  2. Step 2: Convert to fraction form
    620,169.20/930,257.42 = 220,825.40/x
  3. Step 3: Cross multiply
    620,169.20x = 930,257.42 × 220,825.40
  4. Step 4: Simplify right side
    620,169.20x = 205,424,466,874.47
  5. Step 5: Solve for x
    x = 205,424,466,874.47/620,169.20
  6. Step 6: Final answer
    x = 331,239.39

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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.