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Finding the Fourth Proportional to 641,635.86, 885,654.90 and 369,885.51

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Solution

The fourth proportional to 641,635.86, 885,654.90 and 369,885.51 is: 510,555.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,635.86 : 885,654.90 = 369,885.51 : x
  2. Step 2: Convert to fraction form
    641,635.86/885,654.90 = 369,885.51/x
  3. Step 3: Cross multiply
    641,635.86x = 885,654.90 × 369,885.51
  4. Step 4: Simplify right side
    641,635.86x = 327,590,914,370.50
  5. Step 5: Solve for x
    x = 327,590,914,370.50/641,635.86
  6. Step 6: Final answer
    x = 510,555.81

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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.