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Finding the Fourth Proportional to 663,647.80, 915,834.88 and 361,841.80

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Solution

The fourth proportional to 663,647.80, 915,834.88 and 361,841.80 is: 499,342.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,647.80 : 915,834.88 = 361,841.80 : x
  2. Step 2: Convert to fraction form
    663,647.80/915,834.88 = 361,841.80/x
  3. Step 3: Cross multiply
    663,647.80x = 915,834.88 × 361,841.80
  4. Step 4: Simplify right side
    663,647.80x = 331,387,341,481.98
  5. Step 5: Solve for x
    x = 331,387,341,481.98/663,647.80
  6. Step 6: Final answer
    x = 499,342.18

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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.