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Finding the Fourth Proportional to 1,886.95, 2,828.60 and 653.43

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Solution

The fourth proportional to 1,886.95, 2,828.60 and 653.43 is: 979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.95 : 2,828.60 = 653.43 : x
  2. Step 2: Convert to fraction form
    1,886.95/2,828.60 = 653.43/x
  3. Step 3: Cross multiply
    1,886.95x = 2,828.60 × 653.43
  4. Step 4: Simplify right side
    1,886.95x = 1,848,292.10
  5. Step 5: Solve for x
    x = 1,848,292.10/1,886.95
  6. Step 6: Final answer
    x = 979.51

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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.