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Finding the Fourth Proportional to 639,706.70, 959,689.65 and 219,025.10

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Solution

The fourth proportional to 639,706.70, 959,689.65 and 219,025.10 is: 328,582.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,706.70 : 959,689.65 = 219,025.10 : x
  2. Step 2: Convert to fraction form
    639,706.70/959,689.65 = 219,025.10/x
  3. Step 3: Cross multiply
    639,706.70x = 959,689.65 × 219,025.10
  4. Step 4: Simplify right side
    639,706.70x = 210,196,121,560.22
  5. Step 5: Solve for x
    x = 210,196,121,560.22/639,706.70
  6. Step 6: Final answer
    x = 328,582.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.