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Finding the Fourth Proportional to 386,117.52, 579,351.20 and 186,400.68

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Solution

The fourth proportional to 386,117.52, 579,351.20 and 186,400.68 is: 279,685.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,117.52 : 579,351.20 = 186,400.68 : x
  2. Step 2: Convert to fraction form
    386,117.52/579,351.20 = 186,400.68/x
  3. Step 3: Cross multiply
    386,117.52x = 579,351.20 × 186,400.68
  4. Step 4: Simplify right side
    386,117.52x = 107,991,457,638.82
  5. Step 5: Solve for x
    x = 107,991,457,638.82/386,117.52
  6. Step 6: Final answer
    x = 279,685.46

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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.