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Finding the Fourth Proportional to 1,138,710, 1,571,419.80 and 686,094.96

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Solution

The fourth proportional to 1,138,710, 1,571,419.80 and 686,094.96 is: 946,811.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,710 : 1,571,419.80 = 686,094.96 : x
  2. Step 2: Convert to fraction form
    1,138,710/1,571,419.80 = 686,094.96/x
  3. Step 3: Cross multiply
    1,138,710x = 1,571,419.80 × 686,094.96
  4. Step 4: Simplify right side
    1,138,710x = 1,078,143,204,824.21
  5. Step 5: Solve for x
    x = 1,078,143,204,824.21/1,138,710
  6. Step 6: Final answer
    x = 946,811.04

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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.