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Finding the Fourth Proportional to 636,893.29, 878,539.47 and 407,366.83

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Solution

The fourth proportional to 636,893.29, 878,539.47 and 407,366.83 is: 561,927.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,893.29 : 878,539.47 = 407,366.83 : x
  2. Step 2: Convert to fraction form
    636,893.29/878,539.47 = 407,366.83/x
  3. Step 3: Cross multiply
    636,893.29x = 878,539.47 × 407,366.83
  4. Step 4: Simplify right side
    636,893.29x = 357,887,838,923.78
  5. Step 5: Solve for x
    x = 357,887,838,923.78/636,893.29
  6. Step 6: Final answer
    x = 561,927.48

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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.