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Finding the Fourth Proportional to 641,859.84, 885,780.39 and 351,483.66

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Solution

The fourth proportional to 641,859.84, 885,780.39 and 351,483.66 is: 485,055.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,859.84 : 885,780.39 = 351,483.66 : x
  2. Step 2: Convert to fraction form
    641,859.84/885,780.39 = 351,483.66/x
  3. Step 3: Cross multiply
    641,859.84x = 885,780.39 × 351,483.66
  4. Step 4: Simplify right side
    641,859.84x = 311,337,333,433.43
  5. Step 5: Solve for x
    x = 311,337,333,433.43/641,859.84
  6. Step 6: Final answer
    x = 485,055.01

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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.