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Finding the Fourth Proportional to 646,685.60, 970,028.40 and 225,906.80

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Solution

The fourth proportional to 646,685.60, 970,028.40 and 225,906.80 is: 338,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,685.60 : 970,028.40 = 225,906.80 : x
  2. Step 2: Convert to fraction form
    646,685.60/970,028.40 = 225,906.80/x
  3. Step 3: Cross multiply
    646,685.60x = 970,028.40 × 225,906.80
  4. Step 4: Simplify right side
    646,685.60x = 219,136,011,753.12
  5. Step 5: Solve for x
    x = 219,136,011,753.12/646,685.60
  6. Step 6: Final answer
    x = 338,860.20

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Similar ratio
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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.