Home / 1,812.55-2,719.20-579.80

Finding the Fourth Proportional to 1,812.55, 2,719.20 and 579.80

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Solution

The fourth proportional to 1,812.55, 2,719.20 and 579.80 is: 869.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.55 : 2,719.20 = 579.80 : x
  2. Step 2: Convert to fraction form
    1,812.55/2,719.20 = 579.80/x
  3. Step 3: Cross multiply
    1,812.55x = 2,719.20 × 579.80
  4. Step 4: Simplify right side
    1,812.55x = 1,576,592.16
  5. Step 5: Solve for x
    x = 1,576,592.16/1,812.55
  6. Step 6: Final answer
    x = 869.82

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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.