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Finding the Fourth Proportional to 1,826.88, 2,740.16 and 672.64

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Solution

The fourth proportional to 1,826.88, 2,740.16 and 672.64 is: 1,008.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,826.88 : 2,740.16 = 672.64 : x
  2. Step 2: Convert to fraction form
    1,826.88/2,740.16 = 672.64/x
  3. Step 3: Cross multiply
    1,826.88x = 2,740.16 × 672.64
  4. Step 4: Simplify right side
    1,826.88x = 1,843,141.22
  5. Step 5: Solve for x
    x = 1,843,141.22/1,826.88
  6. Step 6: Final answer
    x = 1,008.90

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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.