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Finding the Fourth Proportional to 1,841.84, 2,763.18 and 687.56

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Solution

The fourth proportional to 1,841.84, 2,763.18 and 687.56 is: 1,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,841.84 : 2,763.18 = 687.56 : x
  2. Step 2: Convert to fraction form
    1,841.84/2,763.18 = 687.56/x
  3. Step 3: Cross multiply
    1,841.84x = 2,763.18 × 687.56
  4. Step 4: Simplify right side
    1,841.84x = 1,899,852.04
  5. Step 5: Solve for x
    x = 1,899,852.04/1,841.84
  6. Step 6: Final answer
    x = 1,031.50

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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.