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Finding the Fourth Proportional to 393,689.70, 590,535.77 and 109,395.81

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Solution

The fourth proportional to 393,689.70, 590,535.77 and 109,395.81 is: 164,094.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,689.70 : 590,535.77 = 109,395.81 : x
  2. Step 2: Convert to fraction form
    393,689.70/590,535.77 = 109,395.81/x
  3. Step 3: Cross multiply
    393,689.70x = 590,535.77 × 109,395.81
  4. Step 4: Simplify right side
    393,689.70x = 64,602,138,346.14
  5. Step 5: Solve for x
    x = 64,602,138,346.14/393,689.70
  6. Step 6: Final answer
    x = 164,094.05

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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.