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Finding the Fourth Proportional to 636,892.29, 878,538.09 and 407,365.83

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Solution

The fourth proportional to 636,892.29, 878,538.09 and 407,365.83 is: 561,926.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,892.29 : 878,538.09 = 407,365.83 : x
  2. Step 2: Convert to fraction form
    636,892.29/878,538.09 = 407,365.83/x
  3. Step 3: Cross multiply
    636,892.29x = 878,538.09 × 407,365.83
  4. Step 4: Simplify right side
    636,892.29x = 357,886,398,219.47
  5. Step 5: Solve for x
    x = 357,886,398,219.47/636,892.29
  6. Step 6: Final answer
    x = 561,926.10

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1.5x scale

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.