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Finding the Fourth Proportional to 1,886.12, 2,828.19 and 653.19

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Solution

The fourth proportional to 1,886.12, 2,828.19 and 653.19 is: 979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.12 : 2,828.19 = 653.19 : x
  2. Step 2: Convert to fraction form
    1,886.12/2,828.19 = 653.19/x
  3. Step 3: Cross multiply
    1,886.12x = 2,828.19 × 653.19
  4. Step 4: Simplify right side
    1,886.12x = 1,847,345.43
  5. Step 5: Solve for x
    x = 1,847,345.43/1,886.12
  6. Step 6: Final answer
    x = 979.44

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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.