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Finding the Fourth Proportional to 2,541.36, 3,811.50 and 786

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Solution

The fourth proportional to 2,541.36, 3,811.50 and 786 is: 1,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,541.36 : 3,811.50 = 786 : x
  2. Step 2: Convert to fraction form
    2,541.36/3,811.50 = 786/x
  3. Step 3: Cross multiply
    2,541.36x = 3,811.50 × 786
  4. Step 4: Simplify right side
    2,541.36x = 2,995,839
  5. Step 5: Solve for x
    x = 2,995,839/2,541.36
  6. Step 6: Final answer
    x = 1,178.83

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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.