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Finding the Fourth Proportional to 1,444.51, 1,993.17 and 823.51

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Solution

The fourth proportional to 1,444.51, 1,993.17 and 823.51 is: 1,136.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444.51 : 1,993.17 = 823.51 : x
  2. Step 2: Convert to fraction form
    1,444.51/1,993.17 = 823.51/x
  3. Step 3: Cross multiply
    1,444.51x = 1,993.17 × 823.51
  4. Step 4: Simplify right side
    1,444.51x = 1,641,395.43
  5. Step 5: Solve for x
    x = 1,641,395.43/1,444.51
  6. Step 6: Final answer
    x = 1,136.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.