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Finding the Fourth Proportional to 257,556.60, 386,334.90 and 70,568.10

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Solution

The fourth proportional to 257,556.60, 386,334.90 and 70,568.10 is: 105,852.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,556.60 : 386,334.90 = 70,568.10 : x
  2. Step 2: Convert to fraction form
    257,556.60/386,334.90 = 70,568.10/x
  3. Step 3: Cross multiply
    257,556.60x = 386,334.90 × 70,568.10
  4. Step 4: Simplify right side
    257,556.60x = 27,262,919,856.69
  5. Step 5: Solve for x
    x = 27,262,919,856.69/257,556.60
  6. Step 6: Final answer
    x = 105,852.15

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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.