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Finding the Fourth Proportional to 545,869.20, 818,803.80 and 190,919.10

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Solution

The fourth proportional to 545,869.20, 818,803.80 and 190,919.10 is: 286,378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,869.20 : 818,803.80 = 190,919.10 : x
  2. Step 2: Convert to fraction form
    545,869.20/818,803.80 = 190,919.10/x
  3. Step 3: Cross multiply
    545,869.20x = 818,803.80 × 190,919.10
  4. Step 4: Simplify right side
    545,869.20x = 156,325,284,572.58
  5. Step 5: Solve for x
    x = 156,325,284,572.58/545,869.20
  6. Step 6: Final answer
    x = 286,378.65

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Double scale
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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.