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Finding the Fourth Proportional to 1,811.84, 2,718.24 and 579.20

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Solution

The fourth proportional to 1,811.84, 2,718.24 and 579.20 is: 868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.84 : 2,718.24 = 579.20 : x
  2. Step 2: Convert to fraction form
    1,811.84/2,718.24 = 579.20/x
  3. Step 3: Cross multiply
    1,811.84x = 2,718.24 × 579.20
  4. Step 4: Simplify right side
    1,811.84x = 1,574,404.61
  5. Step 5: Solve for x
    x = 1,574,404.61/1,811.84
  6. Step 6: Final answer
    x = 868.95

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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.