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Finding the Fourth Proportional to 686,901.60, 947,923.56 and 385,095.60

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Solution

The fourth proportional to 686,901.60, 947,923.56 and 385,095.60 is: 531,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,901.60 : 947,923.56 = 385,095.60 : x
  2. Step 2: Convert to fraction form
    686,901.60/947,923.56 = 385,095.60/x
  3. Step 3: Cross multiply
    686,901.60x = 947,923.56 × 385,095.60
  4. Step 4: Simplify right side
    686,901.60x = 365,041,192,092.34
  5. Step 5: Solve for x
    x = 365,041,192,092.34/686,901.60
  6. Step 6: Final answer
    x = 531,431.56

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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.