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Finding the Fourth Proportional to 1,100.38, 1,518.54 and 751.18

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Solution

The fourth proportional to 1,100.38, 1,518.54 and 751.18 is: 1,036.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.38 : 1,518.54 = 751.18 : x
  2. Step 2: Convert to fraction form
    1,100.38/1,518.54 = 751.18/x
  3. Step 3: Cross multiply
    1,100.38x = 1,518.54 × 751.18
  4. Step 4: Simplify right side
    1,100.38x = 1,140,696.88
  5. Step 5: Solve for x
    x = 1,140,696.88/1,100.38
  6. Step 6: Final answer
    x = 1,036.64

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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.