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Finding the Fourth Proportional to 638,777.80, 957,802.20 and 239,431.60

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Solution

The fourth proportional to 638,777.80, 957,802.20 and 239,431.60 is: 359,010.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,777.80 : 957,802.20 = 239,431.60 : x
  2. Step 2: Convert to fraction form
    638,777.80/957,802.20 = 239,431.60/x
  3. Step 3: Cross multiply
    638,777.80x = 957,802.20 × 239,431.60
  4. Step 4: Simplify right side
    638,777.80x = 229,328,113,229.52
  5. Step 5: Solve for x
    x = 229,328,113,229.52/638,777.80
  6. Step 6: Final answer
    x = 359,010.78

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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.