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Finding the Fourth Proportional to 420,147.60, 628,872.60 and 220,182.80

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Solution

The fourth proportional to 420,147.60, 628,872.60 and 220,182.80 is: 329,567.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,147.60 : 628,872.60 = 220,182.80 : x
  2. Step 2: Convert to fraction form
    420,147.60/628,872.60 = 220,182.80/x
  3. Step 3: Cross multiply
    420,147.60x = 628,872.60 × 220,182.80
  4. Step 4: Simplify right side
    420,147.60x = 138,466,929,911.28
  5. Step 5: Solve for x
    x = 138,466,929,911.28/420,147.60
  6. Step 6: Final answer
    x = 329,567.35

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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.