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Finding the Fourth Proportional to 1,809.72, 2,713.57 and 713.79

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Solution

The fourth proportional to 1,809.72, 2,713.57 and 713.79 is: 1,070.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.72 : 2,713.57 = 713.79 : x
  2. Step 2: Convert to fraction form
    1,809.72/2,713.57 = 713.79/x
  3. Step 3: Cross multiply
    1,809.72x = 2,713.57 × 713.79
  4. Step 4: Simplify right side
    1,809.72x = 1,936,925.91
  5. Step 5: Solve for x
    x = 1,936,925.91/1,809.72
  6. Step 6: Final answer
    x = 1,070.29

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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.