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Finding the Fourth Proportional to 818,358.81, 1,226,750.88 and 419,187.57

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Solution

The fourth proportional to 818,358.81, 1,226,750.88 and 419,187.57 is: 628,378.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,358.81 : 1,226,750.88 = 419,187.57 : x
  2. Step 2: Convert to fraction form
    818,358.81/1,226,750.88 = 419,187.57/x
  3. Step 3: Cross multiply
    818,358.81x = 1,226,750.88 × 419,187.57
  4. Step 4: Simplify right side
    818,358.81x = 514,238,720,382.56
  5. Step 5: Solve for x
    x = 514,238,720,382.56/818,358.81
  6. Step 6: Final answer
    x = 628,378.06

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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.