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Finding the Fourth Proportional to 545,856.80, 818,785.20 and 404,139.20

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Solution

The fourth proportional to 545,856.80, 818,785.20 and 404,139.20 is: 606,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,856.80 : 818,785.20 = 404,139.20 : x
  2. Step 2: Convert to fraction form
    545,856.80/818,785.20 = 404,139.20/x
  3. Step 3: Cross multiply
    545,856.80x = 818,785.20 × 404,139.20
  4. Step 4: Simplify right side
    545,856.80x = 330,903,195,699.84
  5. Step 5: Solve for x
    x = 330,903,195,699.84/545,856.80
  6. Step 6: Final answer
    x = 606,208.80

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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.