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Finding the Fourth Proportional to 1,818.73, 2,727.95 and 648.68

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Solution

The fourth proportional to 1,818.73, 2,727.95 and 648.68 is: 972.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.73 : 2,727.95 = 648.68 : x
  2. Step 2: Convert to fraction form
    1,818.73/2,727.95 = 648.68/x
  3. Step 3: Cross multiply
    1,818.73x = 2,727.95 × 648.68
  4. Step 4: Simplify right side
    1,818.73x = 1,769,566.61
  5. Step 5: Solve for x
    x = 1,769,566.61/1,818.73
  6. Step 6: Final answer
    x = 972.97

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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.