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Finding the Fourth Proportional to 638,214.64, 880,886.29 and 396,679.63

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Solution

The fourth proportional to 638,214.64, 880,886.29 and 396,679.63 is: 547,511.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,214.64 : 880,886.29 = 396,679.63 : x
  2. Step 2: Convert to fraction form
    638,214.64/880,886.29 = 396,679.63/x
  3. Step 3: Cross multiply
    638,214.64x = 880,886.29 × 396,679.63
  4. Step 4: Simplify right side
    638,214.64x = 349,429,647,589.27
  5. Step 5: Solve for x
    x = 349,429,647,589.27/638,214.64
  6. Step 6: Final answer
    x = 547,511.18

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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.