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Finding the Fourth Proportional to 1,812.52, 2,718.74 and 579.91

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Solution

The fourth proportional to 1,812.52, 2,718.74 and 579.91 is: 869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.52 : 2,718.74 = 579.91 : x
  2. Step 2: Convert to fraction form
    1,812.52/2,718.74 = 579.91/x
  3. Step 3: Cross multiply
    1,812.52x = 2,718.74 × 579.91
  4. Step 4: Simplify right side
    1,812.52x = 1,576,624.51
  5. Step 5: Solve for x
    x = 1,576,624.51/1,812.52
  6. Step 6: Final answer
    x = 869.85

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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.