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Finding the Fourth Proportional to 497,636.15, 686,717.52 and 279,838.63

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Solution

The fourth proportional to 497,636.15, 686,717.52 and 279,838.63 is: 386,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,636.15 : 686,717.52 = 279,838.63 : x
  2. Step 2: Convert to fraction form
    497,636.15/686,717.52 = 279,838.63/x
  3. Step 3: Cross multiply
    497,636.15x = 686,717.52 × 279,838.63
  4. Step 4: Simplify right side
    497,636.15x = 192,170,087,227.61
  5. Step 5: Solve for x
    x = 192,170,087,227.61/497,636.15
  6. Step 6: Final answer
    x = 386,165.85

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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.