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Finding the Fourth Proportional to 1,811.26, 2,715.63 and 873.64

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Solution

The fourth proportional to 1,811.26, 2,715.63 and 873.64 is: 1,309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.26 : 2,715.63 = 873.64 : x
  2. Step 2: Convert to fraction form
    1,811.26/2,715.63 = 873.64/x
  3. Step 3: Cross multiply
    1,811.26x = 2,715.63 × 873.64
  4. Step 4: Simplify right side
    1,811.26x = 2,372,482.99
  5. Step 5: Solve for x
    x = 2,372,482.99/1,811.26
  6. Step 6: Final answer
    x = 1,309.85

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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.