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Finding the Fourth Proportional to 545,764.80, 818,647.20 and 171,787.80

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Solution

The fourth proportional to 545,764.80, 818,647.20 and 171,787.80 is: 257,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,764.80 : 818,647.20 = 171,787.80 : x
  2. Step 2: Convert to fraction form
    545,764.80/818,647.20 = 171,787.80/x
  3. Step 3: Cross multiply
    545,764.80x = 818,647.20 × 171,787.80
  4. Step 4: Simplify right side
    545,764.80x = 140,633,601,464.16
  5. Step 5: Solve for x
    x = 140,633,601,464.16/545,764.80
  6. Step 6: Final answer
    x = 257,681.70

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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.