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Finding the Fourth Proportional to 686,859.75, 947,866.46 and 385,053.75

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Solution

The fourth proportional to 686,859.75, 947,866.46 and 385,053.75 is: 531,374.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,859.75 : 947,866.46 = 385,053.75 : x
  2. Step 2: Convert to fraction form
    686,859.75/947,866.46 = 385,053.75/x
  3. Step 3: Cross multiply
    686,859.75x = 947,866.46 × 385,053.75
  4. Step 4: Simplify right side
    686,859.75x = 364,979,532,996.96
  5. Step 5: Solve for x
    x = 364,979,532,996.96/686,859.75
  6. Step 6: Final answer
    x = 531,374.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.