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Finding the Fourth Proportional to 1,888.20, 2,605.19 and 1,189.17

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Solution

The fourth proportional to 1,888.20, 2,605.19 and 1,189.17 is: 1,640.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.20 : 2,605.19 = 1,189.17 : x
  2. Step 2: Convert to fraction form
    1,888.20/2,605.19 = 1,189.17/x
  3. Step 3: Cross multiply
    1,888.20x = 2,605.19 × 1,189.17
  4. Step 4: Simplify right side
    1,888.20x = 3,098,007.85
  5. Step 5: Solve for x
    x = 3,098,007.85/1,888.20
  6. Step 6: Final answer
    x = 1,640.72

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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.