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Finding the Fourth Proportional to 636,883.02, 878,525.34 and 407,356.56

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Solution

The fourth proportional to 636,883.02, 878,525.34 and 407,356.56 is: 561,913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,883.02 : 878,525.34 = 407,356.56 : x
  2. Step 2: Convert to fraction form
    636,883.02/878,525.34 = 407,356.56/x
  3. Step 3: Cross multiply
    636,883.02x = 878,525.34 × 407,356.56
  4. Step 4: Simplify right side
    636,883.02x = 357,873,060,375.23
  5. Step 5: Solve for x
    x = 357,873,060,375.23/636,883.02
  6. Step 6: Final answer
    x = 561,913.33

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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.