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Finding the Fourth Proportional to 1,811.92, 2,718.49 and 579.51

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Solution

The fourth proportional to 1,811.92, 2,718.49 and 579.51 is: 869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.92 : 2,718.49 = 579.51 : x
  2. Step 2: Convert to fraction form
    1,811.92/2,718.49 = 579.51/x
  3. Step 3: Cross multiply
    1,811.92x = 2,718.49 × 579.51
  4. Step 4: Simplify right side
    1,811.92x = 1,575,392.14
  5. Step 5: Solve for x
    x = 1,575,392.14/1,811.92
  6. Step 6: Final answer
    x = 869.46

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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.