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Finding the Fourth Proportional to 279,389.40, 419,084.10 and 254,457.60

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Solution

The fourth proportional to 279,389.40, 419,084.10 and 254,457.60 is: 381,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,389.40 : 419,084.10 = 254,457.60 : x
  2. Step 2: Convert to fraction form
    279,389.40/419,084.10 = 254,457.60/x
  3. Step 3: Cross multiply
    279,389.40x = 419,084.10 × 254,457.60
  4. Step 4: Simplify right side
    279,389.40x = 106,639,134,284.16
  5. Step 5: Solve for x
    x = 106,639,134,284.16/279,389.40
  6. Step 6: Final answer
    x = 381,686.40

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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.