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Finding the Fourth Proportional to 636,687.74, 879,889.23 and 521,785.19

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Solution

The fourth proportional to 636,687.74, 879,889.23 and 521,785.19 is: 721,096.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,687.74 : 879,889.23 = 521,785.19 : x
  2. Step 2: Convert to fraction form
    636,687.74/879,889.23 = 521,785.19/x
  3. Step 3: Cross multiply
    636,687.74x = 879,889.23 × 521,785.19
  4. Step 4: Simplify right side
    636,687.74x = 459,113,171,254.23
  5. Step 5: Solve for x
    x = 459,113,171,254.23/636,687.74
  6. Step 6: Final answer
    x = 721,096.29

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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.