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Finding the Fourth Proportional to 1,818.51, 2,726.78 and 648.33

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Solution

The fourth proportional to 1,818.51, 2,726.78 and 648.33 is: 972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.51 : 2,726.78 = 648.33 : x
  2. Step 2: Convert to fraction form
    1,818.51/2,726.78 = 648.33/x
  3. Step 3: Cross multiply
    1,818.51x = 2,726.78 × 648.33
  4. Step 4: Simplify right side
    1,818.51x = 1,767,850.04
  5. Step 5: Solve for x
    x = 1,767,850.04/1,818.51
  6. Step 6: Final answer
    x = 972.14

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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.