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Finding the Fourth Proportional to 1,812.74, 2,719.20 and 514.22

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Solution

The fourth proportional to 1,812.74, 2,719.20 and 514.22 is: 771.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.74 : 2,719.20 = 514.22 : x
  2. Step 2: Convert to fraction form
    1,812.74/2,719.20 = 514.22/x
  3. Step 3: Cross multiply
    1,812.74x = 2,719.20 × 514.22
  4. Step 4: Simplify right side
    1,812.74x = 1,398,267.02
  5. Step 5: Solve for x
    x = 1,398,267.02/1,812.74
  6. Step 6: Final answer
    x = 771.36

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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.