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Finding the Fourth Proportional to 545,216.70, 817,825.05 and 171,239.10

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Solution

The fourth proportional to 545,216.70, 817,825.05 and 171,239.10 is: 256,858.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,216.70 : 817,825.05 = 171,239.10 : x
  2. Step 2: Convert to fraction form
    545,216.70/817,825.05 = 171,239.10/x
  3. Step 3: Cross multiply
    545,216.70x = 817,825.05 × 171,239.10
  4. Step 4: Simplify right side
    545,216.70x = 140,043,625,519.46
  5. Step 5: Solve for x
    x = 140,043,625,519.46/545,216.70
  6. Step 6: Final answer
    x = 256,858.65

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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.