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Finding the Fourth Proportional to 1,809.48, 2,713.55 and 713.25

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Solution

The fourth proportional to 1,809.48, 2,713.55 and 713.25 is: 1,069.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.48 : 2,713.55 = 713.25 : x
  2. Step 2: Convert to fraction form
    1,809.48/2,713.55 = 713.25/x
  3. Step 3: Cross multiply
    1,809.48x = 2,713.55 × 713.25
  4. Step 4: Simplify right side
    1,809.48x = 1,935,435.97
  5. Step 5: Solve for x
    x = 1,935,435.97/1,809.48
  6. Step 6: Final answer
    x = 1,069.61

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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.