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Finding the Fourth Proportional to 641,385.66, 885,205.64 and 369,400.62

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Solution

The fourth proportional to 641,385.66, 885,205.64 and 369,400.62 is: 509,826.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,385.66 : 885,205.64 = 369,400.62 : x
  2. Step 2: Convert to fraction form
    641,385.66/885,205.64 = 369,400.62/x
  3. Step 3: Cross multiply
    641,385.66x = 885,205.64 × 369,400.62
  4. Step 4: Simplify right side
    641,385.66x = 326,995,512,243.50
  5. Step 5: Solve for x
    x = 326,995,512,243.50/641,385.66
  6. Step 6: Final answer
    x = 509,826.67

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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.