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Finding the Fourth Proportional to 2,840.32, 4,260.95 and 892.41

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Solution

The fourth proportional to 2,840.32, 4,260.95 and 892.41 is: 1,338.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.32 : 4,260.95 = 892.41 : x
  2. Step 2: Convert to fraction form
    2,840.32/4,260.95 = 892.41/x
  3. Step 3: Cross multiply
    2,840.32x = 4,260.95 × 892.41
  4. Step 4: Simplify right side
    2,840.32x = 3,802,502.32
  5. Step 5: Solve for x
    x = 3,802,502.32/2,840.32
  6. Step 6: Final answer
    x = 1,338.76

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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.