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Finding the Fourth Proportional to 1,893.65, 2,840.81 and 660.69

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Solution

The fourth proportional to 1,893.65, 2,840.81 and 660.69 is: 991.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,893.65 : 2,840.81 = 660.69 : x
  2. Step 2: Convert to fraction form
    1,893.65/2,840.81 = 660.69/x
  3. Step 3: Cross multiply
    1,893.65x = 2,840.81 × 660.69
  4. Step 4: Simplify right side
    1,893.65x = 1,876,891.46
  5. Step 5: Solve for x
    x = 1,876,891.46/1,893.65
  6. Step 6: Final answer
    x = 991.15

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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.