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Finding the Fourth Proportional to 1,812.81, 2,719.56 and 579.89

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Solution

The fourth proportional to 1,812.81, 2,719.56 and 579.89 is: 869.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.81 : 2,719.56 = 579.89 : x
  2. Step 2: Convert to fraction form
    1,812.81/2,719.56 = 579.89/x
  3. Step 3: Cross multiply
    1,812.81x = 2,719.56 × 579.89
  4. Step 4: Simplify right side
    1,812.81x = 1,577,035.95
  5. Step 5: Solve for x
    x = 1,577,035.95/1,812.81
  6. Step 6: Final answer
    x = 869.94

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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.