Home / 420,140.60-628,862.10-220,175.80

Finding the Fourth Proportional to 420,140.60, 628,862.10 and 220,175.80

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Solution

The fourth proportional to 420,140.60, 628,862.10 and 220,175.80 is: 329,556.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,140.60 : 628,862.10 = 220,175.80 : x
  2. Step 2: Convert to fraction form
    420,140.60/628,862.10 = 220,175.80/x
  3. Step 3: Cross multiply
    420,140.60x = 628,862.10 × 220,175.80
  4. Step 4: Simplify right side
    420,140.60x = 138,460,215,957.18
  5. Step 5: Solve for x
    x = 138,460,215,957.18/420,140.60
  6. Step 6: Final answer
    x = 329,556.86

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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.