Home / 1,861.42-2,568.84-1,115.50

Finding the Fourth Proportional to 1,861.42, 2,568.84 and 1,115.50

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Solution

The fourth proportional to 1,861.42, 2,568.84 and 1,115.50 is: 1,539.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.42 : 2,568.84 = 1,115.50 : x
  2. Step 2: Convert to fraction form
    1,861.42/2,568.84 = 1,115.50/x
  3. Step 3: Cross multiply
    1,861.42x = 2,568.84 × 1,115.50
  4. Step 4: Simplify right side
    1,861.42x = 2,865,541.02
  5. Step 5: Solve for x
    x = 2,865,541.02/1,861.42
  6. Step 6: Final answer
    x = 1,539.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.