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Finding the Fourth Proportional to 636,889.28, 878,533.97 and 407,362.82

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Solution

The fourth proportional to 636,889.28, 878,533.97 and 407,362.82 is: 561,921.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,889.28 : 878,533.97 = 407,362.82 : x
  2. Step 2: Convert to fraction form
    636,889.28/878,533.97 = 407,362.82/x
  3. Step 3: Cross multiply
    636,889.28x = 878,533.97 × 407,362.82
  4. Step 4: Simplify right side
    636,889.28x = 357,882,069,055.51
  5. Step 5: Solve for x
    x = 357,882,069,055.51/636,889.28
  6. Step 6: Final answer
    x = 561,921.96

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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.