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Finding the Fourth Proportional to 2,818.76, 3,888.07 and 1,935.05

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Solution

The fourth proportional to 2,818.76, 3,888.07 and 1,935.05 is: 2,669.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.76 : 3,888.07 = 1,935.05 : x
  2. Step 2: Convert to fraction form
    2,818.76/3,888.07 = 1,935.05/x
  3. Step 3: Cross multiply
    2,818.76x = 3,888.07 × 1,935.05
  4. Step 4: Simplify right side
    2,818.76x = 7,523,585.58
  5. Step 5: Solve for x
    x = 7,523,585.58/2,818.76
  6. Step 6: Final answer
    x = 2,669.12

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Double scale
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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.