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Finding the Fourth Proportional to 1,812.76, 2,719.06 and 514.19

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Solution

The fourth proportional to 1,812.76, 2,719.06 and 514.19 is: 771.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.76 : 2,719.06 = 514.19 : x
  2. Step 2: Convert to fraction form
    1,812.76/2,719.06 = 514.19/x
  3. Step 3: Cross multiply
    1,812.76x = 2,719.06 × 514.19
  4. Step 4: Simplify right side
    1,812.76x = 1,398,113.46
  5. Step 5: Solve for x
    x = 1,398,113.46/1,812.76
  6. Step 6: Final answer
    x = 771.26

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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.