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Finding the Fourth Proportional to 1,811.97, 2,717.90 and 579.45

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Solution

The fourth proportional to 1,811.97, 2,717.90 and 579.45 is: 869.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.97 : 2,717.90 = 579.45 : x
  2. Step 2: Convert to fraction form
    1,811.97/2,717.90 = 579.45/x
  3. Step 3: Cross multiply
    1,811.97x = 2,717.90 × 579.45
  4. Step 4: Simplify right side
    1,811.97x = 1,574,887.16
  5. Step 5: Solve for x
    x = 1,574,887.16/1,811.97
  6. Step 6: Final answer
    x = 869.16

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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.