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Finding the Fourth Proportional to 643,973.60, 965,960.40 and 455,016.80

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Solution

The fourth proportional to 643,973.60, 965,960.40 and 455,016.80 is: 682,525.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,973.60 : 965,960.40 = 455,016.80 : x
  2. Step 2: Convert to fraction form
    643,973.60/965,960.40 = 455,016.80/x
  3. Step 3: Cross multiply
    643,973.60x = 965,960.40 × 455,016.80
  4. Step 4: Simplify right side
    643,973.60x = 439,528,210,134.72
  5. Step 5: Solve for x
    x = 439,528,210,134.72/643,973.60
  6. Step 6: Final answer
    x = 682,525.20

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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.